commit e5e75b344f572b660eb1d7b23d34d7242c5cd56a
Author: Trevor Maze <rochesterx@rochesterx.dev>
Date:   Sun Jan 25 20:58:36 2026 -0500

    SOMEHOW IT WORKS

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0023a53
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5d58067
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,16 @@
+.PHONY: build run clean release test
+
+build:
+	swift build
+
+release:
+	swift build -c release
+
+run:
+	swift run
+
+test:
+	swift test
+
+clean:
+	swift package clean
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..5b4139f
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,15 @@
+// swift-tools-version: 6.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "rxcc",
+    targets: [
+        // Targets are the basic building blocks of a package, defining a module or a test suite.
+        // Targets can depend on other targets in this package and products from dependencies.
+        .executableTarget(
+            name: "rxcc"
+        ),
+    ]
+)
diff --git a/Sources/rxcc/rxcc.swift b/Sources/rxcc/rxcc.swift
new file mode 100644
index 0000000..da87785
--- /dev/null
+++ b/Sources/rxcc/rxcc.swift
@@ -0,0 +1,153 @@
+enum Constant {
+    case Integer(value: Int)
+}
+
+struct Return {
+    let value: Constant
+}
+
+struct Function {
+    let name: String
+    let statement: Return
+}
+
+struct Program {
+    let contents: Function
+}
+
+enum TokenType {
+    case BRACE_OPEN
+    case BRACE_CLOSE
+    case PARENTHESIS_OPEN
+    case PARENTHESIS_CLOSE
+    case SEMICOLON
+    case INT
+    case RETURN
+    case IDENTIFIER
+    case LITERAL_INTEGER
+
+    case UNDEFINED
+}
+
+struct Token {
+    let content: Substring
+    let type: TokenType
+}
+
+typealias Construct = [Element]
+
+enum Element {
+    case Construct(type: Construct)
+    case Token(type: TokenType)
+}
+
+
+
+let expression: Construct = [
+    .Token(type: .LITERAL_INTEGER)
+]
+let statement: Construct = [
+    .Token(type: .RETURN),
+    .Construct(type: expression),
+    .Token(type: .SEMICOLON)
+]
+let function: Construct = [
+    .Token(type: .INT),
+    .Token(type: .IDENTIFIER),
+    .Token(type: .PARENTHESIS_OPEN),
+    .Token(type: .PARENTHESIS_CLOSE),
+    .Token(type: .BRACE_OPEN),
+    .Construct(type: statement),
+    .Token(type: .BRACE_CLOSE)
+]
+let program: Construct = [
+    .Construct(type: function)
+]
+
+
+
+@main
+struct rxcc {
+    static func main() {
+        let lexed: [Substring] = lex(string: """
+        int main() {
+            return 100;
+        }
+        """)
+        parse(lexed: lexed)
+    }
+}
+
+func lex(string: String) -> [Substring] {
+    var line = string.replacing("\n", with: " ")
+    line = line.replacing("\t", with: " ")
+    line = line.replacing("{", with: " { ")
+    line = line.replacing("}", with: " } ")
+    line = line.replacing("(", with: " ( ")
+    line = line.replacing(")", with: " ) ")
+    line = line.replacing(";", with: " ; ")
+
+    do {
+        let tokens: [Substring] = line.split(separator: try Regex(" +"))
+        return tokens
+    } catch {
+        print("Regex did something wrong")
+    }
+    return []
+}
+
+func parse(lexed: [Substring]) {
+    var tokens: [Token] = [Token]()
+    for token: Substring in lexed {
+        let tokenType: TokenType = categorizeToken(token: token)
+        tokens.append(Token(content: token, type: tokenType))
+    }
+    tokens = tokens.reversed()
+
+    if validateConstruct(program, tokens: &tokens) {
+        print("Success")
+        return
+    }
+
+    print("Distinct lack of success")
+}
+
+func validateConstruct(_ construct: Construct, tokens: inout [Token]) -> Bool {
+    for element in construct {
+        switch element {
+        case .Construct(let type):
+            print("Begin validate subconstruct")
+            if !validateConstruct(type, tokens: &tokens) {
+                print("Subconstruct validation failed")
+                return false
+            }
+            print("End validate subconstruct")
+            break
+
+        case .Token(let type):
+            if let token: Token = tokens.popLast() {
+                if type != token.type {
+                    print("VALIDATION FAILED FOR TOKEN \"\(token.content)\"")
+                    return false
+                }
+            }
+        }
+    }
+
+    return true
+}
+
+func categorizeToken(token: Substring) -> TokenType {
+    if token.firstMatch(of: /{/) != nil { return .BRACE_OPEN }
+    else if token.firstMatch(of: /}/) != nil { return .BRACE_CLOSE }
+    else if token.firstMatch(of: /\(/) != nil { return .PARENTHESIS_OPEN }
+    else if token.firstMatch(of: /\)/) != nil { return .PARENTHESIS_CLOSE }
+    else if token.firstMatch(of: /;/) != nil { return .SEMICOLON }
+    else if token.firstMatch(of: /int/) != nil { return .INT }
+    else if token.firstMatch(of: /return/) != nil { return .RETURN }
+    else if token.firstMatch(of: /[a-zA-Z]\w*/) != nil { return .IDENTIFIER }
+    else if token.firstMatch(of: /[0-9]+/) != nil { return .LITERAL_INTEGER }
+
+    return .UNDEFINED
+}
+
diff --git a/c/a.out b/c/a.out
new file mode 100755
index 0000000..90f76cf
Binary files /dev/null and b/c/a.out differ
diff --git a/c/return_2 b/c/return_2
new file mode 100755
index 0000000..096aa21
Binary files /dev/null and b/c/return_2 differ
diff --git a/c/return_2.c b/c/return_2.c
new file mode 100644
index 0000000..76598f0
--- /dev/null
+++ b/c/return_2.c
@@ -0,0 +1,4 @@
+int main() {
+    return 2;
+}
+
diff --git a/c/return_2.s b/c/return_2.s
new file mode 100644
index 0000000..b949824
--- /dev/null
+++ b/c/return_2.s
@@ -0,0 +1,35 @@
+	.file	"return_2.c"
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB0:
+	.cfi_startproc
+	pushl	%ebp
+	.cfi_def_cfa_offset 8
+	.cfi_offset 5, -8
+	movl	%esp, %ebp
+	.cfi_def_cfa_register 5
+	call	__x86.get_pc_thunk.ax
+	addl	$_GLOBAL_OFFSET_TABLE_, %eax
+	movl	$2, %eax
+	popl	%ebp
+	.cfi_restore 5
+	.cfi_def_cfa 4, 4
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	main, .-main
+	.section	.text.__x86.get_pc_thunk.ax,"axG",@progbits,__x86.get_pc_thunk.ax,comdat
+	.globl	__x86.get_pc_thunk.ax
+	.hidden	__x86.get_pc_thunk.ax
+	.type	__x86.get_pc_thunk.ax, @function
+__x86.get_pc_thunk.ax:
+.LFB1:
+	.cfi_startproc
+	movl	(%esp), %eax
+	ret
+	.cfi_endproc
+.LFE1:
+	.ident	"GCC: (GNU) 15.2.1 20260103"
+	.section	.note.GNU-stack,"",@progbits
diff --git a/c/test_compiler.sh b/c/test_compiler.sh
new file mode 100755
index 0000000..ccc485a
--- /dev/null
+++ b/c/test_compiler.sh
@@ -0,0 +1,158 @@
+#!/bin/bash
+
+padding_dots=$(printf '%0.1s' "."{1..60})
+padlength=50
+cmp=$1
+success_total=0
+failure_total=0
+
+print_test_name () {
+    test_name=$1
+    printf '%s' "$test_name"
+    printf '%*.*s' 0 $((padlength - ${#test_name})) "$padding_dots"
+}
+
+test_success () {
+    echo "OK"
+    ((success++))
+}
+
+test_failure () {
+    echo "FAIL"
+    ((fail++))
+}
+
+test_not_implemented () {
+    echo "NOT IMPLEMENTED"
+}
+
+run_our_program () {
+    actual_out=`./$1 2>/dev/null`
+    actual_exit_code=$?
+    rm $1 2>/dev/null
+}
+
+run_correct_program () {
+    expected_out=`./a.out`
+    expected_exit_code=$?
+    rm a.out
+}
+
+compare_program_results () {
+    # make sure exit code is correct
+    if [ "$expected_exit_code" -ne "$actual_exit_code" ] || [ "$expected_out" != "$actual_out" ]
+    then
+        test_failure
+    else
+        test_success
+    fi
+}
+
+test_stage () {
+    success=0
+    fail=0
+    echo "===================================================="
+    echo "STAGE $1"
+    echo "===================Valid Programs==================="
+    for prog in `find . -type f -name "*.c" -path "./stage_$1/valid/*" -not -path "*/valid_multifile/*" 2>/dev/null`; do
+
+        gcc -w $prog
+        run_correct_program
+
+        base="${prog%.*}" #name of executable (filename w/out extension)
+        test_name="${base##*valid/}"
+
+        print_test_name $test_name
+        $cmp $prog 2>/dev/null
+        status=$?
+
+        if [[ $test_name == "skip_on_failure"* ]]; then
+            # this may depend on features we haven't implemented yet
+            # if compilation succeeds, make sure it gives the right result
+            # otherwise don't count it as success or failure
+            if [[ -f $base ]] && [[ $status -eq 0 ]]; then
+                # it succeeded, so run it and make sure it gives the right result
+                run_our_program $base
+                compare_program_results
+            else
+                test_not_implemented
+            fi
+        else
+            run_our_program $base
+            compare_program_results
+        fi
+    done
+    # programs with multiple source files
+    for dir in `ls -d stage_$1/valid_multifile/* 2>/dev/null` ; do
+        gcc -w $dir/*
+
+        run_correct_program
+
+        base="${dir%.*}" #name of executable (directory w/out extension)
+        test_name="${base##*valid_multifile/}"
+
+        # need to explicitly specify output name
+        $cmp -o "$test_name" $dir/* >/dev/null
+
+        print_test_name $test_name
+
+        # check output/exit codes
+        run_our_program $test_name
+        compare_program_results
+
+    done
+    echo "===================Invalid Programs================="
+    for prog in `ls stage_$1/invalid/{,**/}*.c 2>/dev/null`; do
+
+        base="${prog%.*}" #name of executable (filename w/out extension)
+        test_name="${base##*invalid/}"
+
+        $cmp $prog >/dev/null 2>&1
+        status=$? #failed, as we expect, if exit code != 0
+        print_test_name $test_name
+
+        # make sure neither executable nor assembly was produced
+        # and exit code is non-zero
+        if [[ -f $base || -f $base".s" ]]
+        then
+            test_failure
+            rm $base 2>/dev/null
+            rm $base".s" 2>/dev/null
+        else
+            test_success
+        fi
+    done
+    echo "===================Stage $1 Summary================="
+    printf "%d successes, %d failures\n" $success $fail
+    ((success_total=success_total+success))
+    ((failure_total=failure_total + fail))
+}
+
+total_summary () {
+    echo "===================TOTAL SUMMARY===================="
+    printf "%d successes, %d failures\n" $success_total $failure_total
+}
+
+if [ "$1" == "" ]; then
+    echo "USAGE: ./test_compiler.sh /path/to/compiler [stages(optional)]"
+    echo "EXAMPLE(test specific stages): ./test_compiler.sh ./mycompiler 1 2 4"
+    echo "EXAMPLE(test all): ./test_compiler.sh ./mycompiler"
+    exit 1
+fi
+
+if test 1 -lt $#; then
+   testcases=("$@") # [1..-1] is testcases
+   for i in `seq 2 $#`; do
+       test_stage ${testcases[$i-1]}
+   done
+   total_summary
+   exit 0
+fi
+
+num_stages=10
+
+for i in `seq 1 $num_stages`; do
+    test_stage $i
+done
+
+total_summary
diff --git a/c/tests/stage_1/invalid/missing_paren.c b/c/tests/stage_1/invalid/missing_paren.c
new file mode 100644
index 0000000..8e72a5c
--- /dev/null
+++ b/c/tests/stage_1/invalid/missing_paren.c
@@ -0,0 +1,3 @@
+int main( {
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/invalid/missing_retval.c b/c/tests/stage_1/invalid/missing_retval.c
new file mode 100644
index 0000000..2f8d9bf
--- /dev/null
+++ b/c/tests/stage_1/invalid/missing_retval.c
@@ -0,0 +1,3 @@
+int main() {
+    return;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/invalid/no_brace.c b/c/tests/stage_1/invalid/no_brace.c
new file mode 100644
index 0000000..96aac66
--- /dev/null
+++ b/c/tests/stage_1/invalid/no_brace.c
@@ -0,0 +1,2 @@
+int main() {
+    return 0;
diff --git a/c/tests/stage_1/invalid/no_semicolon.c b/c/tests/stage_1/invalid/no_semicolon.c
new file mode 100644
index 0000000..584f789
--- /dev/null
+++ b/c/tests/stage_1/invalid/no_semicolon.c
@@ -0,0 +1,3 @@
+int main() {
+    return 0
+}
diff --git a/c/tests/stage_1/invalid/no_space.c b/c/tests/stage_1/invalid/no_space.c
new file mode 100644
index 0000000..14a289b
--- /dev/null
+++ b/c/tests/stage_1/invalid/no_space.c
@@ -0,0 +1,3 @@
+int main() {
+    return0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/invalid/wrong_case.c b/c/tests/stage_1/invalid/wrong_case.c
new file mode 100644
index 0000000..bbae350
--- /dev/null
+++ b/c/tests/stage_1/invalid/wrong_case.c
@@ -0,0 +1,3 @@
+int main() {
+    RETURN 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/valid/multi_digit.c b/c/tests/stage_1/valid/multi_digit.c
new file mode 100644
index 0000000..13f3123
--- /dev/null
+++ b/c/tests/stage_1/valid/multi_digit.c
@@ -0,0 +1,3 @@
+int main() {
+    return 100;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/valid/newlines.c b/c/tests/stage_1/valid/newlines.c
new file mode 100644
index 0000000..7d8ba2e
--- /dev/null
+++ b/c/tests/stage_1/valid/newlines.c
@@ -0,0 +1,10 @@
+
+int 
+main
+(   
+)
+{
+return
+0
+;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/valid/no_newlines.c b/c/tests/stage_1/valid/no_newlines.c
new file mode 100644
index 0000000..6a86477
--- /dev/null
+++ b/c/tests/stage_1/valid/no_newlines.c
@@ -0,0 +1 @@
+int main(){return 0;}
\ No newline at end of file
diff --git a/c/tests/stage_1/valid/return_0.c b/c/tests/stage_1/valid/return_0.c
new file mode 100644
index 0000000..e9cdae1
--- /dev/null
+++ b/c/tests/stage_1/valid/return_0.c
@@ -0,0 +1,3 @@
+int main() {
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/valid/return_2.c b/c/tests/stage_1/valid/return_2.c
new file mode 100644
index 0000000..5c52fee
--- /dev/null
+++ b/c/tests/stage_1/valid/return_2.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_1/valid/spaces.c b/c/tests/stage_1/valid/spaces.c
new file mode 100644
index 0000000..e77bfef
--- /dev/null
+++ b/c/tests/stage_1/valid/spaces.c
@@ -0,0 +1 @@
+   int   main    (  )  {   return  0 ; }
\ No newline at end of file
diff --git a/c/tests/stage_10/invalid/fun_redefined_as_var.c b/c/tests/stage_10/invalid/fun_redefined_as_var.c
new file mode 100644
index 0000000..8efff10
--- /dev/null
+++ b/c/tests/stage_10/invalid/fun_redefined_as_var.c
@@ -0,0 +1,9 @@
+int foo() {
+    return 3;
+}
+
+int foo = 4;
+
+int main() {
+    return foo;
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/invalid/multiple_global_defs.c b/c/tests/stage_10/invalid/multiple_global_defs.c
new file mode 100644
index 0000000..d46a90e
--- /dev/null
+++ b/c/tests/stage_10/invalid/multiple_global_defs.c
@@ -0,0 +1,7 @@
+int foo = 3;
+
+int main() {
+    return foo;
+}
+
+int foo = 0;
\ No newline at end of file
diff --git a/c/tests/stage_10/invalid/non_constant_init.c b/c/tests/stage_10/invalid/non_constant_init.c
new file mode 100644
index 0000000..aa5f3f8
--- /dev/null
+++ b/c/tests/stage_10/invalid/non_constant_init.c
@@ -0,0 +1,6 @@
+int foo = 3;
+int bar = foo + 1;
+
+int main() {
+    return bar;
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/invalid/use_before_declaration.c b/c/tests/stage_10/invalid/use_before_declaration.c
new file mode 100644
index 0000000..32504c6
--- /dev/null
+++ b/c/tests/stage_10/invalid/use_before_declaration.c
@@ -0,0 +1,5 @@
+int main() {
+    return foo;
+}
+
+int foo = 3;
\ No newline at end of file
diff --git a/c/tests/stage_10/invalid/var_redefined_as_fun.c b/c/tests/stage_10/invalid/var_redefined_as_fun.c
new file mode 100644
index 0000000..cf39438
--- /dev/null
+++ b/c/tests/stage_10/invalid/var_redefined_as_fun.c
@@ -0,0 +1,9 @@
+int foo = 4;
+
+int foo() {
+    return 3;
+}
+
+int main() {
+    return foo;
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/invalid/variable_used_as_fun.c b/c/tests/stage_10/invalid/variable_used_as_fun.c
new file mode 100644
index 0000000..3d4884b
--- /dev/null
+++ b/c/tests/stage_10/invalid/variable_used_as_fun.c
@@ -0,0 +1,5 @@
+int foo = 3;
+
+int main() {
+    return foo();
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/valid/forward_declaration.c b/c/tests/stage_10/valid/forward_declaration.c
new file mode 100644
index 0000000..ce6e560
--- /dev/null
+++ b/c/tests/stage_10/valid/forward_declaration.c
@@ -0,0 +1,7 @@
+int foo;
+
+int main() {
+    return foo;
+}
+
+int foo = 3;
\ No newline at end of file
diff --git a/c/tests/stage_10/valid/fun_shadowed_by_variable.c b/c/tests/stage_10/valid/fun_shadowed_by_variable.c
new file mode 100644
index 0000000..8f400c8
--- /dev/null
+++ b/c/tests/stage_10/valid/fun_shadowed_by_variable.c
@@ -0,0 +1,8 @@
+int foo() {
+    return 3;
+}
+
+int main() {
+    int foo = 5;
+    return foo;
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/valid/global.c b/c/tests/stage_10/valid/global.c
new file mode 100644
index 0000000..59095a6
--- /dev/null
+++ b/c/tests/stage_10/valid/global.c
@@ -0,0 +1,5 @@
+int foo = 4;
+
+int main() {
+    return foo + 3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/valid/global_not_initialized.c b/c/tests/stage_10/valid/global_not_initialized.c
new file mode 100644
index 0000000..d8b75ec
--- /dev/null
+++ b/c/tests/stage_10/valid/global_not_initialized.c
@@ -0,0 +1,7 @@
+int foo;
+
+int main() {
+    for (int i = 0; i < 3; i = i + 1)
+        foo = foo + 1;
+    return foo;
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/valid/global_shadowed.c b/c/tests/stage_10/valid/global_shadowed.c
new file mode 100644
index 0000000..762c326
--- /dev/null
+++ b/c/tests/stage_10/valid/global_shadowed.c
@@ -0,0 +1,10 @@
+int a = 3;
+
+int main() {
+    int ret = 0;
+    if (a) {
+        int a = 0;
+        ret = 4;
+    }
+    return ret;
+}
\ No newline at end of file
diff --git a/c/tests/stage_10/valid/multiple_global.c b/c/tests/stage_10/valid/multiple_global.c
new file mode 100644
index 0000000..909e246
--- /dev/null
+++ b/c/tests/stage_10/valid/multiple_global.c
@@ -0,0 +1,6 @@
+int a = 3;
+int b = 4;
+
+int main() {
+    return a * b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/invalid/missing_const.c b/c/tests/stage_2/invalid/missing_const.c
new file mode 100644
index 0000000..6dd069e
--- /dev/null
+++ b/c/tests/stage_2/invalid/missing_const.c
@@ -0,0 +1,3 @@
+int main() {
+    return !;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/invalid/missing_semicolon.c b/c/tests/stage_2/invalid/missing_semicolon.c
new file mode 100644
index 0000000..5570d64
--- /dev/null
+++ b/c/tests/stage_2/invalid/missing_semicolon.c
@@ -0,0 +1,3 @@
+int main() {
+    return !5
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/invalid/nested_missing_const.c b/c/tests/stage_2/invalid/nested_missing_const.c
new file mode 100644
index 0000000..43b7097
--- /dev/null
+++ b/c/tests/stage_2/invalid/nested_missing_const.c
@@ -0,0 +1,3 @@
+int main() {
+    return !~;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/invalid/wrong_order.c b/c/tests/stage_2/invalid/wrong_order.c
new file mode 100644
index 0000000..27a9f02
--- /dev/null
+++ b/c/tests/stage_2/invalid/wrong_order.c
@@ -0,0 +1,3 @@
+int main() {
+    return 4-;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/valid/bitwise.c b/c/tests/stage_2/valid/bitwise.c
new file mode 100644
index 0000000..a0070d3
--- /dev/null
+++ b/c/tests/stage_2/valid/bitwise.c
@@ -0,0 +1,3 @@
+int main() {
+    return ~12;
+}
diff --git a/c/tests/stage_2/valid/bitwise_zero.c b/c/tests/stage_2/valid/bitwise_zero.c
new file mode 100644
index 0000000..2c2ed2e
--- /dev/null
+++ b/c/tests/stage_2/valid/bitwise_zero.c
@@ -0,0 +1,3 @@
+int main() {
+    return ~0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/valid/neg.c b/c/tests/stage_2/valid/neg.c
new file mode 100644
index 0000000..b7ac431
--- /dev/null
+++ b/c/tests/stage_2/valid/neg.c
@@ -0,0 +1,3 @@
+int main() {
+    return -5;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/valid/nested_ops.c b/c/tests/stage_2/valid/nested_ops.c
new file mode 100644
index 0000000..9fb3f87
--- /dev/null
+++ b/c/tests/stage_2/valid/nested_ops.c
@@ -0,0 +1,3 @@
+int main() {
+    return !-3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/valid/nested_ops_2.c b/c/tests/stage_2/valid/nested_ops_2.c
new file mode 100644
index 0000000..416d4d1
--- /dev/null
+++ b/c/tests/stage_2/valid/nested_ops_2.c
@@ -0,0 +1,3 @@
+int main() {
+    return -~0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/valid/not_five.c b/c/tests/stage_2/valid/not_five.c
new file mode 100644
index 0000000..df792bb
--- /dev/null
+++ b/c/tests/stage_2/valid/not_five.c
@@ -0,0 +1,3 @@
+int main() {
+    return !5;
+}
\ No newline at end of file
diff --git a/c/tests/stage_2/valid/not_zero.c b/c/tests/stage_2/valid/not_zero.c
new file mode 100644
index 0000000..b6b7cb5
--- /dev/null
+++ b/c/tests/stage_2/valid/not_zero.c
@@ -0,0 +1,3 @@
+int main() {
+    return !0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/invalid/malformed_paren.c b/c/tests/stage_3/invalid/malformed_paren.c
new file mode 100644
index 0000000..3c444bc
--- /dev/null
+++ b/c/tests/stage_3/invalid/malformed_paren.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 (- 3);
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/invalid/missing_first_op.c b/c/tests/stage_3/invalid/missing_first_op.c
new file mode 100644
index 0000000..84a3c34
--- /dev/null
+++ b/c/tests/stage_3/invalid/missing_first_op.c
@@ -0,0 +1,3 @@
+int main() {
+    return /3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/invalid/missing_second_op.c b/c/tests/stage_3/invalid/missing_second_op.c
new file mode 100644
index 0000000..a0a313b
--- /dev/null
+++ b/c/tests/stage_3/invalid/missing_second_op.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 + ;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/invalid/no_semicolon.c b/c/tests/stage_3/invalid/no_semicolon.c
new file mode 100644
index 0000000..0704f18
--- /dev/null
+++ b/c/tests/stage_3/invalid/no_semicolon.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2*2
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/add.c b/c/tests/stage_3/valid/add.c
new file mode 100644
index 0000000..464d543
--- /dev/null
+++ b/c/tests/stage_3/valid/add.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 + 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/associativity.c b/c/tests/stage_3/valid/associativity.c
new file mode 100644
index 0000000..d099bdf
--- /dev/null
+++ b/c/tests/stage_3/valid/associativity.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 - 2 - 3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/associativity_2.c b/c/tests/stage_3/valid/associativity_2.c
new file mode 100644
index 0000000..511ba51
--- /dev/null
+++ b/c/tests/stage_3/valid/associativity_2.c
@@ -0,0 +1,3 @@
+int main() {
+    return 6 / 3 / 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/div.c b/c/tests/stage_3/valid/div.c
new file mode 100644
index 0000000..ebe1577
--- /dev/null
+++ b/c/tests/stage_3/valid/div.c
@@ -0,0 +1,3 @@
+int main() {
+    return 4 / 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/div_neg.c b/c/tests/stage_3/valid/div_neg.c
new file mode 100644
index 0000000..a8feb93
--- /dev/null
+++ b/c/tests/stage_3/valid/div_neg.c
@@ -0,0 +1,3 @@
+int main() {
+    return (-12) / 5;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/mult.c b/c/tests/stage_3/valid/mult.c
new file mode 100644
index 0000000..fb22f95
--- /dev/null
+++ b/c/tests/stage_3/valid/mult.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 * 3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/parens.c b/c/tests/stage_3/valid/parens.c
new file mode 100644
index 0000000..f7d427b
--- /dev/null
+++ b/c/tests/stage_3/valid/parens.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 * (3 + 4);
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/precedence.c b/c/tests/stage_3/valid/precedence.c
new file mode 100644
index 0000000..b6d3c3d
--- /dev/null
+++ b/c/tests/stage_3/valid/precedence.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 + 3 * 4;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/sub.c b/c/tests/stage_3/valid/sub.c
new file mode 100644
index 0000000..39cdcfa
--- /dev/null
+++ b/c/tests/stage_3/valid/sub.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 - 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/sub_neg.c b/c/tests/stage_3/valid/sub_neg.c
new file mode 100644
index 0000000..67b0dac
--- /dev/null
+++ b/c/tests/stage_3/valid/sub_neg.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2- -1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/unop_add.c b/c/tests/stage_3/valid/unop_add.c
new file mode 100644
index 0000000..3049b00
--- /dev/null
+++ b/c/tests/stage_3/valid/unop_add.c
@@ -0,0 +1,3 @@
+int main() {
+    return ~2 + 3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_3/valid/unop_parens.c b/c/tests/stage_3/valid/unop_parens.c
new file mode 100644
index 0000000..d3f6e24
--- /dev/null
+++ b/c/tests/stage_3/valid/unop_parens.c
@@ -0,0 +1,3 @@
+int main() {
+    return ~(1 + 1);
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/invalid/missing_first_op.c b/c/tests/stage_4/invalid/missing_first_op.c
new file mode 100644
index 0000000..5af3bb3
--- /dev/null
+++ b/c/tests/stage_4/invalid/missing_first_op.c
@@ -0,0 +1,3 @@
+int main() {
+    return <= 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/invalid/missing_mid_op.c b/c/tests/stage_4/invalid/missing_mid_op.c
new file mode 100644
index 0000000..4b36056
--- /dev/null
+++ b/c/tests/stage_4/invalid/missing_mid_op.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 < > 3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/invalid/missing_second_op.c b/c/tests/stage_4/invalid/missing_second_op.c
new file mode 100644
index 0000000..8f1513a
--- /dev/null
+++ b/c/tests/stage_4/invalid/missing_second_op.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 &&
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/invalid/missing_semicolon.c b/c/tests/stage_4/invalid/missing_semicolon.c
new file mode 100644
index 0000000..deafd68
--- /dev/null
+++ b/c/tests/stage_4/invalid/missing_semicolon.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 || 2
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/and_false.c b/c/tests/stage_4/valid/and_false.c
new file mode 100644
index 0000000..f1ad90b
--- /dev/null
+++ b/c/tests/stage_4/valid/and_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 && 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/and_true.c b/c/tests/stage_4/valid/and_true.c
new file mode 100644
index 0000000..87d3131
--- /dev/null
+++ b/c/tests/stage_4/valid/and_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 && -1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/eq_false.c b/c/tests/stage_4/valid/eq_false.c
new file mode 100644
index 0000000..39895e9
--- /dev/null
+++ b/c/tests/stage_4/valid/eq_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 == 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/eq_true.c b/c/tests/stage_4/valid/eq_true.c
new file mode 100644
index 0000000..1a6f8eb
--- /dev/null
+++ b/c/tests/stage_4/valid/eq_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 == 1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/ge_false.c b/c/tests/stage_4/valid/ge_false.c
new file mode 100644
index 0000000..abeaf9a
--- /dev/null
+++ b/c/tests/stage_4/valid/ge_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 >= 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/ge_true.c b/c/tests/stage_4/valid/ge_true.c
new file mode 100644
index 0000000..e3729d0
--- /dev/null
+++ b/c/tests/stage_4/valid/ge_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 >= 1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/gt_false.c b/c/tests/stage_4/valid/gt_false.c
new file mode 100644
index 0000000..3bf766b
--- /dev/null
+++ b/c/tests/stage_4/valid/gt_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 > 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/gt_true.c b/c/tests/stage_4/valid/gt_true.c
new file mode 100644
index 0000000..ad051a4
--- /dev/null
+++ b/c/tests/stage_4/valid/gt_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 > 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/le_false.c b/c/tests/stage_4/valid/le_false.c
new file mode 100644
index 0000000..e29deeb
--- /dev/null
+++ b/c/tests/stage_4/valid/le_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 <= -1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/le_true.c b/c/tests/stage_4/valid/le_true.c
new file mode 100644
index 0000000..d45dbeb
--- /dev/null
+++ b/c/tests/stage_4/valid/le_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return 0 <= 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/lt_false.c b/c/tests/stage_4/valid/lt_false.c
new file mode 100644
index 0000000..5e33fae
--- /dev/null
+++ b/c/tests/stage_4/valid/lt_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 < 1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/lt_true.c b/c/tests/stage_4/valid/lt_true.c
new file mode 100644
index 0000000..a82436b
--- /dev/null
+++ b/c/tests/stage_4/valid/lt_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 < 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/ne_false.c b/c/tests/stage_4/valid/ne_false.c
new file mode 100644
index 0000000..b13c3a8
--- /dev/null
+++ b/c/tests/stage_4/valid/ne_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 0 != 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/ne_true.c b/c/tests/stage_4/valid/ne_true.c
new file mode 100644
index 0000000..de775a4
--- /dev/null
+++ b/c/tests/stage_4/valid/ne_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return -1 != -2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/or_false.c b/c/tests/stage_4/valid/or_false.c
new file mode 100644
index 0000000..693c1f5
--- /dev/null
+++ b/c/tests/stage_4/valid/or_false.c
@@ -0,0 +1,3 @@
+int main() {
+    return 0 || 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/or_true.c b/c/tests/stage_4/valid/or_true.c
new file mode 100644
index 0000000..fb40e98
--- /dev/null
+++ b/c/tests/stage_4/valid/or_true.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 || 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/precedence.c b/c/tests/stage_4/valid/precedence.c
new file mode 100644
index 0000000..711bde1
--- /dev/null
+++ b/c/tests/stage_4/valid/precedence.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 || 0 && 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/precedence_2.c b/c/tests/stage_4/valid/precedence_2.c
new file mode 100644
index 0000000..7d3fc81
--- /dev/null
+++ b/c/tests/stage_4/valid/precedence_2.c
@@ -0,0 +1,3 @@
+int main() {
+    return (1 || 0) && 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/precedence_3.c b/c/tests/stage_4/valid/precedence_3.c
new file mode 100644
index 0000000..8bf357a
--- /dev/null
+++ b/c/tests/stage_4/valid/precedence_3.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 == 2 > 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/precedence_4.c b/c/tests/stage_4/valid/precedence_4.c
new file mode 100644
index 0000000..87d4a39
--- /dev/null
+++ b/c/tests/stage_4/valid/precedence_4.c
@@ -0,0 +1,3 @@
+int main() {
+    return 2 == 2 || 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/skip_on_failure_multi_short_circuit.c b/c/tests/stage_4/valid/skip_on_failure_multi_short_circuit.c
new file mode 100644
index 0000000..8d6912f
--- /dev/null
+++ b/c/tests/stage_4/valid/skip_on_failure_multi_short_circuit.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 0;
+    a || (a = 3) || (a = 4);
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/skip_on_failure_short_circuit_and.c b/c/tests/stage_4/valid/skip_on_failure_short_circuit_and.c
new file mode 100644
index 0000000..a48b05c
--- /dev/null
+++ b/c/tests/stage_4/valid/skip_on_failure_short_circuit_and.c
@@ -0,0 +1,6 @@
+int main() {
+    int a = 0;
+    int b = 0;
+    a && (b = 5);
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_4/valid/skip_on_failure_short_circuit_or.c b/c/tests/stage_4/valid/skip_on_failure_short_circuit_or.c
new file mode 100644
index 0000000..934f771
--- /dev/null
+++ b/c/tests/stage_4/valid/skip_on_failure_short_circuit_or.c
@@ -0,0 +1,6 @@
+int main() {
+    int a = 1;
+    int b = 0;
+    a || (b = 5);
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/redefine.c b/c/tests/stage_5/invalid/redefine.c
new file mode 100644
index 0000000..3b2f9c4
--- /dev/null
+++ b/c/tests/stage_5/invalid/redefine.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 1;
+    int a = 2;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/syntax_err_bad_decl.c b/c/tests/stage_5/invalid/syntax_err_bad_decl.c
new file mode 100644
index 0000000..1ed774d
--- /dev/null
+++ b/c/tests/stage_5/invalid/syntax_err_bad_decl.c
@@ -0,0 +1,4 @@
+int main() {
+    ints a = 1;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/syntax_err_bad_decl_2.c b/c/tests/stage_5/invalid/syntax_err_bad_decl_2.c
new file mode 100644
index 0000000..5d6b4d0
--- /dev/null
+++ b/c/tests/stage_5/invalid/syntax_err_bad_decl_2.c
@@ -0,0 +1,4 @@
+int main() {
+    int foo bar = 3;
+    return bar;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/syntax_err_bad_lvalue.c b/c/tests/stage_5/invalid/syntax_err_bad_lvalue.c
new file mode 100644
index 0000000..7f8a5f8
--- /dev/null
+++ b/c/tests/stage_5/invalid/syntax_err_bad_lvalue.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 2;
+    a + 3 = 4;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/syntax_err_bad_lvalue_2.c b/c/tests/stage_5/invalid/syntax_err_bad_lvalue_2.c
new file mode 100644
index 0000000..2954621
--- /dev/null
+++ b/c/tests/stage_5/invalid/syntax_err_bad_lvalue_2.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 2;
+    !a = 3;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/syntax_err_no_semicolon.c b/c/tests/stage_5/invalid/syntax_err_no_semicolon.c
new file mode 100644
index 0000000..29f6738
--- /dev/null
+++ b/c/tests/stage_5/invalid/syntax_err_no_semicolon.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 2
+    a = a + 4;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/undeclared_var.c b/c/tests/stage_5/invalid/undeclared_var.c
new file mode 100644
index 0000000..a49ad45
--- /dev/null
+++ b/c/tests/stage_5/invalid/undeclared_var.c
@@ -0,0 +1,3 @@
+int main() {
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/invalid/var_declared_late.c b/c/tests/stage_5/invalid/var_declared_late.c
new file mode 100644
index 0000000..a283aab
--- /dev/null
+++ b/c/tests/stage_5/invalid/var_declared_late.c
@@ -0,0 +1,5 @@
+int main() {
+    a = 1 + 2;
+    int a;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/assign.c b/c/tests/stage_5/valid/assign.c
new file mode 100644
index 0000000..10f91a0
--- /dev/null
+++ b/c/tests/stage_5/valid/assign.c
@@ -0,0 +1,5 @@
+int main() {
+    int a;
+    a = 2;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/assign_val.c b/c/tests/stage_5/valid/assign_val.c
new file mode 100644
index 0000000..3a8d163
--- /dev/null
+++ b/c/tests/stage_5/valid/assign_val.c
@@ -0,0 +1,5 @@
+int main() {
+    int a;
+    int b = a = 0;
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/exp_return_val.c b/c/tests/stage_5/valid/exp_return_val.c
new file mode 100644
index 0000000..76c2f6c
--- /dev/null
+++ b/c/tests/stage_5/valid/exp_return_val.c
@@ -0,0 +1,6 @@
+int main() {
+    int a;
+    int b;
+    a = b = 4;
+    return a - b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/initialize.c b/c/tests/stage_5/valid/initialize.c
new file mode 100644
index 0000000..6f0f5dd
--- /dev/null
+++ b/c/tests/stage_5/valid/initialize.c
@@ -0,0 +1,4 @@
+int main() {
+    int a = 2;
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/missing_return.c b/c/tests/stage_5/valid/missing_return.c
new file mode 100644
index 0000000..704dacc
--- /dev/null
+++ b/c/tests/stage_5/valid/missing_return.c
@@ -0,0 +1,3 @@
+int main() {
+
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/multiple_vars.c b/c/tests/stage_5/valid/multiple_vars.c
new file mode 100644
index 0000000..0d4caef
--- /dev/null
+++ b/c/tests/stage_5/valid/multiple_vars.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 1;
+    int b = 2;
+    return a + b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/no_initialize.c b/c/tests/stage_5/valid/no_initialize.c
new file mode 100644
index 0000000..b6543fb
--- /dev/null
+++ b/c/tests/stage_5/valid/no_initialize.c
@@ -0,0 +1,4 @@
+int main() {
+    int a;
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/refer.c b/c/tests/stage_5/valid/refer.c
new file mode 100644
index 0000000..89e9b3f
--- /dev/null
+++ b/c/tests/stage_5/valid/refer.c
@@ -0,0 +1,4 @@
+int main() {
+    int a = 2;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_5/valid/unused_exp.c b/c/tests/stage_5/valid/unused_exp.c
new file mode 100644
index 0000000..82e2181
--- /dev/null
+++ b/c/tests/stage_5/valid/unused_exp.c
@@ -0,0 +1,4 @@
+int main() {
+    2 + 2;
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/invalid/expression/incomplete_ternary.c b/c/tests/stage_6/invalid/expression/incomplete_ternary.c
new file mode 100644
index 0000000..d0e69e9
--- /dev/null
+++ b/c/tests/stage_6/invalid/expression/incomplete_ternary.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 ? 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/invalid/expression/malformed_ternary.c b/c/tests/stage_6/invalid/expression/malformed_ternary.c
new file mode 100644
index 0000000..020d41a
--- /dev/null
+++ b/c/tests/stage_6/invalid/expression/malformed_ternary.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 ? 2 : 3 : 4;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/invalid/expression/malformed_ternary_2.c b/c/tests/stage_6/invalid/expression/malformed_ternary_2.c
new file mode 100644
index 0000000..e902288
--- /dev/null
+++ b/c/tests/stage_6/invalid/expression/malformed_ternary_2.c
@@ -0,0 +1,3 @@
+int main() {
+    return 1 ? 2 ? 3 : 4;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/invalid/expression/ternary_assign.c b/c/tests/stage_6/invalid/expression/ternary_assign.c
new file mode 100644
index 0000000..b2ff76b
--- /dev/null
+++ b/c/tests/stage_6/invalid/expression/ternary_assign.c
@@ -0,0 +1,6 @@
+int main() {
+    int a = 2;
+    int b = 1;
+    a > b ? a = 1 : a = 0;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/invalid/statement/declare_statement.c b/c/tests/stage_6/invalid/statement/declare_statement.c
new file mode 100644
index 0000000..dca9d0c
--- /dev/null
+++ b/c/tests/stage_6/invalid/statement/declare_statement.c
@@ -0,0 +1,4 @@
+int main() {
+    if (5)
+        int i = 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/invalid/statement/if_assignment.c b/c/tests/stage_6/invalid/statement/if_assignment.c
new file mode 100644
index 0000000..ad3036d
--- /dev/null
+++ b/c/tests/stage_6/invalid/statement/if_assignment.c
@@ -0,0 +1,8 @@
+int main() {
+    int flag = 0;
+    int a = if (flag)
+                2;
+            else
+                3;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/invalid/statement/mismatched_nesting.c b/c/tests/stage_6/invalid/statement/mismatched_nesting.c
new file mode 100644
index 0000000..a3322bc
--- /dev/null
+++ b/c/tests/stage_6/invalid/statement/mismatched_nesting.c
@@ -0,0 +1,9 @@
+int main() {
+    int a = 0;
+    if (1)
+        return 1;
+    else
+        return 2;
+    else
+        return 3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/assign_ternary.c b/c/tests/stage_6/valid/expression/assign_ternary.c
new file mode 100644
index 0000000..519ce72
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/assign_ternary.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 0;
+    a = 1 ? 2 : 3;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/multiple_ternary.c b/c/tests/stage_6/valid/expression/multiple_ternary.c
new file mode 100644
index 0000000..d2e7cc2
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/multiple_ternary.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 1 > 2 ? 3 : 4;
+    int b = 1 > 2 ? 5 : 6;
+    return a + b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/nested_ternary.c b/c/tests/stage_6/valid/expression/nested_ternary.c
new file mode 100644
index 0000000..b18a4d1
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/nested_ternary.c
@@ -0,0 +1,7 @@
+int main() {
+    int a = 1;
+    int b = 2;
+    int flag = 0;
+
+    return a > b ? 5 : flag ? 6 : 7;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/nested_ternary_2.c b/c/tests/stage_6/valid/expression/nested_ternary_2.c
new file mode 100644
index 0000000..8da4bd7
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/nested_ternary_2.c
@@ -0,0 +1,5 @@
+int main() {
+    int a = 1 ? 2 ? 3 : 4 : 5;
+    int b = 0 ? 2 ? 3 : 4 : 5;
+    return a * b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/rh_assignment.c b/c/tests/stage_6/valid/expression/rh_assignment.c
new file mode 100644
index 0000000..d08f6b6
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/rh_assignment.c
@@ -0,0 +1,6 @@
+int main() {
+    int flag = 1;
+    int a = 0;
+    flag ? a = 1 : (a = 0);
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/ternary.c b/c/tests/stage_6/valid/expression/ternary.c
new file mode 100644
index 0000000..4013c4f
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/ternary.c
@@ -0,0 +1,4 @@
+int main() {
+    int a = 0;
+    return a > -1 ? 4 : 5;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/ternary_short_circuit.c b/c/tests/stage_6/valid/expression/ternary_short_circuit.c
new file mode 100644
index 0000000..70203ef
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/ternary_short_circuit.c
@@ -0,0 +1,6 @@
+int main() {
+    int a = 1;
+    int b = 0;
+    a ? (b = 1) : (b = 2);
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/expression/ternary_short_circuit_2.c b/c/tests/stage_6/valid/expression/ternary_short_circuit_2.c
new file mode 100644
index 0000000..78d225e
--- /dev/null
+++ b/c/tests/stage_6/valid/expression/ternary_short_circuit_2.c
@@ -0,0 +1,6 @@
+int main() {
+    int a = 0;
+    int b = 0;
+    a ? (b = 1) : (b = 2);
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/else.c b/c/tests/stage_6/valid/statement/else.c
new file mode 100644
index 0000000..1314bbe
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/else.c
@@ -0,0 +1,7 @@
+int main() {
+    int a = 0;
+    if (a)
+        return 1;
+    else
+        return 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/if_nested.c b/c/tests/stage_6/valid/statement/if_nested.c
new file mode 100644
index 0000000..9b0afa8
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/if_nested.c
@@ -0,0 +1,9 @@
+int main() {
+    int a = 1;
+    int b = 0;
+    if (a)
+        b = 1;
+    else if (b)
+        b = 2;
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/if_nested_2.c b/c/tests/stage_6/valid/statement/if_nested_2.c
new file mode 100644
index 0000000..2826706
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/if_nested_2.c
@@ -0,0 +1,9 @@
+int main() {
+    int a = 0;
+    int b = 1;
+    if (a)
+        b = 1;
+    else if (b)
+        b = 2;
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/if_nested_3.c b/c/tests/stage_6/valid/statement/if_nested_3.c
new file mode 100644
index 0000000..e387f00
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/if_nested_3.c
@@ -0,0 +1,10 @@
+int main() {
+    int a = 0;
+    if (1)
+        if (2)
+            a = 3;
+        else
+            a = 4;
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/if_nested_4.c b/c/tests/stage_6/valid/statement/if_nested_4.c
new file mode 100644
index 0000000..e2a321c
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/if_nested_4.c
@@ -0,0 +1,10 @@
+int main() {
+    int a = 0;
+    if (1)
+        if (0)
+            a = 3;
+        else
+            a = 4;
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/if_nested_5.c b/c/tests/stage_6/valid/statement/if_nested_5.c
new file mode 100644
index 0000000..a83f7c8
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/if_nested_5.c
@@ -0,0 +1,12 @@
+int main() {
+    int a = 0;
+    if (0)
+        if (0)
+            a = 3;
+        else
+            a = 4;
+    else
+        a = 1;
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/if_not_taken.c b/c/tests/stage_6/valid/statement/if_not_taken.c
new file mode 100644
index 0000000..41b22c0
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/if_not_taken.c
@@ -0,0 +1,7 @@
+int main() {
+    int a = 0;
+    int b = 0;
+    if (a)
+        b = 1;
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/if_taken.c b/c/tests/stage_6/valid/statement/if_taken.c
new file mode 100644
index 0000000..d136154
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/if_taken.c
@@ -0,0 +1,7 @@
+int main() {
+    int a = 1;
+    int b = 0;
+    if (a)
+        b = 1;
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_6/valid/statement/multiple_if.c b/c/tests/stage_6/valid/statement/multiple_if.c
new file mode 100644
index 0000000..b651130
--- /dev/null
+++ b/c/tests/stage_6/valid/statement/multiple_if.c
@@ -0,0 +1,16 @@
+int main() {
+    int a = 0;
+    int b = 0;
+
+    if (a)
+        a = 2;
+    else
+        a = 3;
+
+    if (b)
+        b = 4;
+    else
+        b = 5;
+
+    return a + b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/invalid/double_define.c b/c/tests/stage_7/invalid/double_define.c
new file mode 100644
index 0000000..ae3ed74
--- /dev/null
+++ b/c/tests/stage_7/invalid/double_define.c
@@ -0,0 +1,6 @@
+int main() {
+    {
+        int a;
+        int a;
+    }
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/invalid/out_of_scope.c b/c/tests/stage_7/invalid/out_of_scope.c
new file mode 100644
index 0000000..7a12aba
--- /dev/null
+++ b/c/tests/stage_7/invalid/out_of_scope.c
@@ -0,0 +1,6 @@
+int main() {
+    {
+        int a = 2;
+    }
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/invalid/syntax_err_extra_brace.c b/c/tests/stage_7/invalid/syntax_err_extra_brace.c
new file mode 100644
index 0000000..782c2d6
--- /dev/null
+++ b/c/tests/stage_7/invalid/syntax_err_extra_brace.c
@@ -0,0 +1,6 @@
+int main() {
+    if(0){
+        return 1;
+    }}
+    return 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/invalid/syntax_err_missing_brace.c b/c/tests/stage_7/invalid/syntax_err_missing_brace.c
new file mode 100644
index 0000000..0b1cfc6
--- /dev/null
+++ b/c/tests/stage_7/invalid/syntax_err_missing_brace.c
@@ -0,0 +1,5 @@
+int main() {
+    if(0){
+        return 1;
+    return 2;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/consecutive_blocks.c b/c/tests/stage_7/valid/consecutive_blocks.c
new file mode 100644
index 0000000..1839fb5
--- /dev/null
+++ b/c/tests/stage_7/valid/consecutive_blocks.c
@@ -0,0 +1,9 @@
+int main() {
+    int a = 1;
+    {
+        int a = 2;
+    }
+    {
+        return a;
+    }
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/consecutive_declarations.c b/c/tests/stage_7/valid/consecutive_declarations.c
new file mode 100644
index 0000000..34fad83
--- /dev/null
+++ b/c/tests/stage_7/valid/consecutive_declarations.c
@@ -0,0 +1,12 @@
+int main() {
+    int a = 0;
+    {
+        int b = 1;
+        a = b;
+    }
+    {
+        int b = 2;
+        a = a + b;
+    }
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/declare_after_block.c b/c/tests/stage_7/valid/declare_after_block.c
new file mode 100644
index 0000000..25ad580
--- /dev/null
+++ b/c/tests/stage_7/valid/declare_after_block.c
@@ -0,0 +1,8 @@
+int main() {
+    int i = 0;
+    {
+        int a = 2;
+    }
+    int b = 3;
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/declare_block.c b/c/tests/stage_7/valid/declare_block.c
new file mode 100644
index 0000000..3c4469c
--- /dev/null
+++ b/c/tests/stage_7/valid/declare_block.c
@@ -0,0 +1,6 @@
+int main() {
+    if (5) {
+        int i = 0;
+        return i;
+    }
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/declare_late.c b/c/tests/stage_7/valid/declare_late.c
new file mode 100644
index 0000000..948977d
--- /dev/null
+++ b/c/tests/stage_7/valid/declare_late.c
@@ -0,0 +1,8 @@
+int main() {
+    int a = 2;
+    {
+        a = 3;
+        int a = 0;
+    }
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/multi_nesting.c b/c/tests/stage_7/valid/multi_nesting.c
new file mode 100644
index 0000000..3e4acd6
--- /dev/null
+++ b/c/tests/stage_7/valid/multi_nesting.c
@@ -0,0 +1,10 @@
+int main(){
+    int a = 2;
+    if (a < 3) {
+        {
+            int a = 3;
+            return a;
+        }
+        return a;
+    }
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/nested_if.c b/c/tests/stage_7/valid/nested_if.c
new file mode 100644
index 0000000..f20a7bf
--- /dev/null
+++ b/c/tests/stage_7/valid/nested_if.c
@@ -0,0 +1,15 @@
+int main() {
+    int a = 0;
+    if (a) {
+        int b = 2;
+        return b;
+    } else {
+        int c = 3;
+        if (a < c) {
+            return 4;
+        } else {
+            return 5;
+        }
+    }
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_7/valid/nested_scope.c b/c/tests/stage_7/valid/nested_scope.c
new file mode 100644
index 0000000..a7268f4
--- /dev/null
+++ b/c/tests/stage_7/valid/nested_scope.c
@@ -0,0 +1,9 @@
+int main() {
+    int a = 2;
+    int b = 3;
+    {
+        int a = 1;
+        b = b + a;
+    }
+    return b;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/break_not_in_loop.c b/c/tests/stage_8/invalid/break_not_in_loop.c
new file mode 100644
index 0000000..f2b16d6
--- /dev/null
+++ b/c/tests/stage_8/invalid/break_not_in_loop.c
@@ -0,0 +1,3 @@
+int main() {
+    break;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/continue_not_in_loop.c b/c/tests/stage_8/invalid/continue_not_in_loop.c
new file mode 100644
index 0000000..4f268a6
--- /dev/null
+++ b/c/tests/stage_8/invalid/continue_not_in_loop.c
@@ -0,0 +1,3 @@
+int main() {
+    continue;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/out_of_scope.c b/c/tests/stage_8/invalid/out_of_scope.c
new file mode 100644
index 0000000..1246d92
--- /dev/null
+++ b/c/tests/stage_8/invalid/out_of_scope.c
@@ -0,0 +1,8 @@
+int main() {
+
+    while (1) {
+        int a = 2;
+    }
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/out_of_scope_do_while.c b/c/tests/stage_8/invalid/out_of_scope_do_while.c
new file mode 100644
index 0000000..7a2815c
--- /dev/null
+++ b/c/tests/stage_8/invalid/out_of_scope_do_while.c
@@ -0,0 +1,6 @@
+int main() {
+    do {
+        int a = 2;
+    } while (a);
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/syntax_err_do_no_semicolon.c b/c/tests/stage_8/invalid/syntax_err_do_no_semicolon.c
new file mode 100644
index 0000000..a6552fe
--- /dev/null
+++ b/c/tests/stage_8/invalid/syntax_err_do_no_semicolon.c
@@ -0,0 +1,5 @@
+int main() {
+    do
+        3;
+    while (4)
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/syntax_err_empty_clause.c b/c/tests/stage_8/invalid/syntax_err_empty_clause.c
new file mode 100644
index 0000000..43ad620
--- /dev/null
+++ b/c/tests/stage_8/invalid/syntax_err_empty_clause.c
@@ -0,0 +1,4 @@
+int main() {
+    for (int i = 2; ))
+        int a = 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/syntax_err_paren_mismatch.c b/c/tests/stage_8/invalid/syntax_err_paren_mismatch.c
new file mode 100644
index 0000000..43ad620
--- /dev/null
+++ b/c/tests/stage_8/invalid/syntax_err_paren_mismatch.c
@@ -0,0 +1,4 @@
+int main() {
+    for (int i = 2; ))
+        int a = 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/syntax_err_statement_in_condition.c b/c/tests/stage_8/invalid/syntax_err_statement_in_condition.c
new file mode 100644
index 0000000..12457b4
--- /dev/null
+++ b/c/tests/stage_8/invalid/syntax_err_statement_in_condition.c
@@ -0,0 +1,5 @@
+int main() {
+    while(int a) {
+        2;
+    }
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/syntax_err_too_few_for_clauses.c b/c/tests/stage_8/invalid/syntax_err_too_few_for_clauses.c
new file mode 100644
index 0000000..9e4205d
--- /dev/null
+++ b/c/tests/stage_8/invalid/syntax_err_too_few_for_clauses.c
@@ -0,0 +1,5 @@
+int main() {
+    for (int i = 2; i < 3)
+        3;
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/invalid/syntax_err_too_many_for_clauses.c b/c/tests/stage_8/invalid/syntax_err_too_many_for_clauses.c
new file mode 100644
index 0000000..fdb2f1c
--- /dev/null
+++ b/c/tests/stage_8/invalid/syntax_err_too_many_for_clauses.c
@@ -0,0 +1,5 @@
+int main() {
+    for (;;;)
+        3;
+    return 0;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/break.c b/c/tests/stage_8/valid/break.c
new file mode 100644
index 0000000..bd3d237
--- /dev/null
+++ b/c/tests/stage_8/valid/break.c
@@ -0,0 +1,9 @@
+int main() {
+    int sum = 0;
+    for (int i = 0; i < 10; i = i + 1) {
+        sum = sum + i;
+        if (sum > 10)
+            break;
+    }
+    return sum;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/continue.c b/c/tests/stage_8/valid/continue.c
new file mode 100644
index 0000000..3e70d3f
--- /dev/null
+++ b/c/tests/stage_8/valid/continue.c
@@ -0,0 +1,9 @@
+int main() {
+    int sum = 0;
+    for (int i = 0; i < 10; i = i + 1) {
+        if ((sum / 2) * 2 != sum)
+            continue;
+        sum = sum + i;
+    }
+    return sum;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/continue_empty_post.c b/c/tests/stage_8/valid/continue_empty_post.c
new file mode 100644
index 0000000..9e2674f
--- /dev/null
+++ b/c/tests/stage_8/valid/continue_empty_post.c
@@ -0,0 +1,10 @@
+int main() {
+    int sum = 0;
+    for (int i = 0; i < 10;) {
+        i = i + 1;
+        if (i % 2)
+            continue;
+        sum = sum + i;
+    }
+    return sum;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/do_while.c b/c/tests/stage_8/valid/do_while.c
new file mode 100644
index 0000000..d6b038a
--- /dev/null
+++ b/c/tests/stage_8/valid/do_while.c
@@ -0,0 +1,8 @@
+int main() {
+    int a = 1;
+    do {
+        a = a * 2;
+    } while(a < 11);
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/empty_expression.c b/c/tests/stage_8/valid/empty_expression.c
new file mode 100644
index 0000000..da04c1a
--- /dev/null
+++ b/c/tests/stage_8/valid/empty_expression.c
@@ -0,0 +1,7 @@
+int main() {
+    int i = 3;
+    ; 
+    for (int i = 0; i < 10; i = i + 1)
+        ;
+    return i;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/for.c b/c/tests/stage_8/valid/for.c
new file mode 100644
index 0000000..02f4453
--- /dev/null
+++ b/c/tests/stage_8/valid/for.c
@@ -0,0 +1,7 @@
+int main() {
+    int a = 0;
+
+    for (a = 0; a < 3; a = a + 1)
+        a = a * 2;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/for_decl.c b/c/tests/stage_8/valid/for_decl.c
new file mode 100644
index 0000000..9505855
--- /dev/null
+++ b/c/tests/stage_8/valid/for_decl.c
@@ -0,0 +1,7 @@
+int main() {
+    int a = 0;
+
+    for (int i = 0; i < 3; i = i + 1)
+        a = a + 1;
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/for_empty.c b/c/tests/stage_8/valid/for_empty.c
new file mode 100644
index 0000000..b55ae31
--- /dev/null
+++ b/c/tests/stage_8/valid/for_empty.c
@@ -0,0 +1,10 @@
+int main() {
+    int a = 0;
+    for (; ; ) {
+        a = a + 1;
+        if (a > 3)
+            break;
+    }
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/for_nested_scope.c b/c/tests/stage_8/valid/for_nested_scope.c
new file mode 100644
index 0000000..2b961da
--- /dev/null
+++ b/c/tests/stage_8/valid/for_nested_scope.c
@@ -0,0 +1,14 @@
+int main() {
+    int i = 0;
+    int j = 0;
+
+    for (int i = 100; i > 0; i = i - 1) {
+        int i = 0;
+        int k = j;
+        int j = k * 2 + i;
+    }
+
+    int k = 3;
+
+    return j + k;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/for_variable_shadow.c b/c/tests/stage_8/valid/for_variable_shadow.c
new file mode 100644
index 0000000..89adf1d
--- /dev/null
+++ b/c/tests/stage_8/valid/for_variable_shadow.c
@@ -0,0 +1,10 @@
+int main() {
+    int i = 0;
+    int j = 0;
+    for (i = 0; i < 10; i = i + 1) {
+        int k = i;
+        for (int i = k; i < 10; i = i + 1)
+            j = j + 1;
+    }
+    return j + i;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/nested_break.c b/c/tests/stage_8/valid/nested_break.c
new file mode 100644
index 0000000..da6704c
--- /dev/null
+++ b/c/tests/stage_8/valid/nested_break.c
@@ -0,0 +1,10 @@
+int main() {
+    int ans = 0;
+    for (int i = 0; i < 10; i = i + 1)
+        for (int j = 0; j < 10; j = j + 1)
+            if ((i / 2)*2 == i)
+                break;
+            else
+                ans = ans + i;
+    return ans;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/nested_while.c b/c/tests/stage_8/valid/nested_while.c
new file mode 100644
index 0000000..0ec1105
--- /dev/null
+++ b/c/tests/stage_8/valid/nested_while.c
@@ -0,0 +1,12 @@
+int main() {
+    int a = 1;
+
+    while (a / 3 < 20) {
+        int b = 1;
+        while (b < 10)
+            b = b*2;
+        a = a + b;
+    }
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/return_in_while.c b/c/tests/stage_8/valid/return_in_while.c
new file mode 100644
index 0000000..6ead13d
--- /dev/null
+++ b/c/tests/stage_8/valid/return_in_while.c
@@ -0,0 +1,5 @@
+int main() {
+    while (1) {
+        return 2;
+    }
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/while_multi_statement.c b/c/tests/stage_8/valid/while_multi_statement.c
new file mode 100644
index 0000000..62d4a5d
--- /dev/null
+++ b/c/tests/stage_8/valid/while_multi_statement.c
@@ -0,0 +1,11 @@
+int main() {
+    int a = 0;
+    int b = 1;
+
+    while (a < 5) {
+        a = a + 2;
+        b = b * a;
+    }
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_8/valid/while_single_statement.c b/c/tests/stage_8/valid/while_single_statement.c
new file mode 100644
index 0000000..b9c382f
--- /dev/null
+++ b/c/tests/stage_8/valid/while_single_statement.c
@@ -0,0 +1,8 @@
+int main() {
+    int a = 0;
+
+    while (a < 5)
+        a = a + 2;
+
+    return a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/invalid/bad_arg.c b/c/tests/stage_9/invalid/bad_arg.c
new file mode 100644
index 0000000..651ade1
--- /dev/null
+++ b/c/tests/stage_9/invalid/bad_arg.c
@@ -0,0 +1,7 @@
+int foo(int a){
+    return 3 + a;
+}
+
+int main(){
+    return foo();
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/invalid/declaration_mismatch.c b/c/tests/stage_9/invalid/declaration_mismatch.c
new file mode 100644
index 0000000..4f10f78
--- /dev/null
+++ b/c/tests/stage_9/invalid/declaration_mismatch.c
@@ -0,0 +1,9 @@
+int foo(int a);
+
+int main() {
+    return 5;
+}
+
+int foo(int a, int b) {
+    return 4;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/invalid/declaration_mismatch_2.c b/c/tests/stage_9/invalid/declaration_mismatch_2.c
new file mode 100644
index 0000000..944655c
--- /dev/null
+++ b/c/tests/stage_9/invalid/declaration_mismatch_2.c
@@ -0,0 +1,9 @@
+int foo(int a, int b);
+
+int main() {
+    return 5;
+}
+
+int foo(int a) {
+    return 4;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/invalid/redefine_function.c b/c/tests/stage_9/invalid/redefine_function.c
new file mode 100644
index 0000000..8250e6c
--- /dev/null
+++ b/c/tests/stage_9/invalid/redefine_function.c
@@ -0,0 +1,11 @@
+int foo(){
+    return 3;
+}
+
+int main() {
+    return foo();
+}
+
+int foo(){
+    return 4;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/invalid/redefine_variable.c b/c/tests/stage_9/invalid/redefine_variable.c
new file mode 100644
index 0000000..b42c1d9
--- /dev/null
+++ b/c/tests/stage_9/invalid/redefine_variable.c
@@ -0,0 +1,7 @@
+int foo(int x) {
+    int x = 3;
+}
+
+int main() {
+    foo(1);
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/invalid/too_many_args.c b/c/tests/stage_9/invalid/too_many_args.c
new file mode 100644
index 0000000..9b074d4
--- /dev/null
+++ b/c/tests/stage_9/invalid/too_many_args.c
@@ -0,0 +1,7 @@
+int foo(int a) {
+    return a + 1;
+}
+
+int main() {
+    return foo(1, 2);
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/expression_args.c b/c/tests/stage_9/valid/expression_args.c
new file mode 100644
index 0000000..be4f694
--- /dev/null
+++ b/c/tests/stage_9/valid/expression_args.c
@@ -0,0 +1,8 @@
+int add(int a, int b) {
+    return a + b;
+}
+
+int main() {
+    int sum = add(1 + 2, 4);
+    return sum + sum;
+}
diff --git a/c/tests/stage_9/valid/fib.c b/c/tests/stage_9/valid/fib.c
new file mode 100644
index 0000000..6b5e982
--- /dev/null
+++ b/c/tests/stage_9/valid/fib.c
@@ -0,0 +1,12 @@
+int fib(int n) {
+    if (n == 0 || n == 1) {
+        return n;
+    } else {
+        return fib(n - 1) + fib(n - 2);
+    }
+}
+
+int main() {
+    int n = 5;
+    return fib(n);
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/forward_decl.c b/c/tests/stage_9/valid/forward_decl.c
new file mode 100644
index 0000000..795ebe8
--- /dev/null
+++ b/c/tests/stage_9/valid/forward_decl.c
@@ -0,0 +1,9 @@
+int foo();
+
+int main() {
+    return foo();
+}
+
+int foo() {
+    return 3;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/forward_decl_args.c b/c/tests/stage_9/valid/forward_decl_args.c
new file mode 100644
index 0000000..aea4e2b
--- /dev/null
+++ b/c/tests/stage_9/valid/forward_decl_args.c
@@ -0,0 +1,9 @@
+int foo(int a);
+
+int main(){
+    return foo(3);
+}
+
+int foo(int a){
+    return a + 1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/forward_decl_multi_arg.c b/c/tests/stage_9/valid/forward_decl_multi_arg.c
new file mode 100644
index 0000000..4694fba
--- /dev/null
+++ b/c/tests/stage_9/valid/forward_decl_multi_arg.c
@@ -0,0 +1,9 @@
+int foo(int a, int b);
+
+int main() {
+    return foo(1, 2);
+}
+
+int foo(int x, int y){
+    return x - y;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/fun_in_expr.c b/c/tests/stage_9/valid/fun_in_expr.c
new file mode 100644
index 0000000..35e71e8
--- /dev/null
+++ b/c/tests/stage_9/valid/fun_in_expr.c
@@ -0,0 +1,9 @@
+int sum(int a, int b) {
+    return a + b;
+}
+
+int main() {
+    int a = sum(1, 2) - (sum(1, 2) / 2) * 2;
+    int b = 2*sum(3, 4) + sum(1, 2);
+    return b - a;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/hello_world.c b/c/tests/stage_9/valid/hello_world.c
new file mode 100644
index 0000000..d829028
--- /dev/null
+++ b/c/tests/stage_9/valid/hello_world.c
@@ -0,0 +1,18 @@
+int putchar(int c);
+
+int main() {
+    putchar(72);
+    putchar(101);
+    putchar(108);
+    putchar(108);
+    putchar(111);
+    putchar(44);
+    putchar(32);
+    putchar(87);
+    putchar(111);
+    putchar(114);
+    putchar(108);
+    putchar(100);
+    putchar(33);
+    putchar(10);
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/later_decl.c b/c/tests/stage_9/valid/later_decl.c
new file mode 100644
index 0000000..10d463b
--- /dev/null
+++ b/c/tests/stage_9/valid/later_decl.c
@@ -0,0 +1,9 @@
+int foo(int a) {
+    return a + 1;
+}
+
+int main() {
+    return foo(4);
+}
+
+int foo(int a);
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/multi_arg.c b/c/tests/stage_9/valid/multi_arg.c
new file mode 100644
index 0000000..db04cc2
--- /dev/null
+++ b/c/tests/stage_9/valid/multi_arg.c
@@ -0,0 +1,7 @@
+int sub_3(int x, int y, int z) {
+    return x - y - z;
+}
+
+int main() {
+    return sub_3(10, 4, 2);
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/mutual_recursion.c b/c/tests/stage_9/valid/mutual_recursion.c
new file mode 100644
index 0000000..71de6bd
--- /dev/null
+++ b/c/tests/stage_9/valid/mutual_recursion.c
@@ -0,0 +1,22 @@
+int foo(int a);
+int bar(int b);
+
+int main() {
+    return foo(5);
+}
+
+int foo(int a) {
+    if (a <= 0) {
+        return a;
+    }
+
+    return a + bar(a - 1);
+}
+
+int bar(int b) {
+    if (b <= 0) {
+        return b;
+    }
+
+    return b + bar(b / 2);
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/no_arg.c b/c/tests/stage_9/valid/no_arg.c
new file mode 100644
index 0000000..e5dd720
--- /dev/null
+++ b/c/tests/stage_9/valid/no_arg.c
@@ -0,0 +1,7 @@
+int three(){
+    return 3;
+}
+
+int main() {
+    return three();
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/precedence.c b/c/tests/stage_9/valid/precedence.c
new file mode 100644
index 0000000..3f9b432
--- /dev/null
+++ b/c/tests/stage_9/valid/precedence.c
@@ -0,0 +1,7 @@
+int three() {
+    return 3;
+}
+
+int main() {
+    return !three();
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/rename_function_param.c b/c/tests/stage_9/valid/rename_function_param.c
new file mode 100644
index 0000000..2115d9e
--- /dev/null
+++ b/c/tests/stage_9/valid/rename_function_param.c
@@ -0,0 +1,9 @@
+int foo(int b);
+
+int main(){
+    return foo(3);
+}
+
+int foo(int a){
+    return a + 1;
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/single_arg.c b/c/tests/stage_9/valid/single_arg.c
new file mode 100644
index 0000000..3fdfcfb
--- /dev/null
+++ b/c/tests/stage_9/valid/single_arg.c
@@ -0,0 +1,7 @@
+int twice(int x){
+    return 2 * x;
+}
+
+int main() {
+    return twice(3);
+}
\ No newline at end of file
diff --git a/c/tests/stage_9/valid/variable_as_arg.c b/c/tests/stage_9/valid/variable_as_arg.c
new file mode 100644
index 0000000..f4bc83e
--- /dev/null
+++ b/c/tests/stage_9/valid/variable_as_arg.c
@@ -0,0 +1,8 @@
+int foo(int x) {
+    return x + 1;
+}
+
+int main() {
+    int a = 1;
+    return foo(a);
+}
diff --git a/run b/run
new file mode 100755
index 0000000..280106f
--- /dev/null
+++ b/run
@@ -0,0 +1,3 @@
+#!/bin/bash
+make run
+