Python-Like-C

Lightweight educational interpreter (C++) with Python-like syntax. Intended for learning lexer/parser/interpreter basics.

Highlights

• Assignments and integer arithmetic (+, -, *, /)
• Conditionals (if) and comparison (==, <, >)
• while loops
• print statements
• Functions with parameters and return
• Indentation-based blocks (4 spaces per INDENT) and scoped variables
• Arrays with indexing and assignment

Quick start (Windows PowerShell)

1. Build (requires g++ on PATH):

./scripts/build_all.ps1

2. Run interpreter (optional filename argument):

./build/main.exe [path\to\script.txt]

3. Run test suite:

./build/run_tests.exe

Array Usage

// Create an array with bracket notation
arr = [1, 2, 3, 4, 5]

// Access elements by index (0-based)
x = arr[0]  // x = 1
y = arr[2]  // y = 3

// Modify elements
arr[1] = 10  // arr becomes [1, 10, 3, 4, 5]

// Use in expressions
result = arr[0] + arr[1]  // result = 11

// Print array elements
print arr[3]  // prints 4

Notes

• Function bodies use {} braces; if/while use a colon and indented blocks.
• The lexer emits one INDENT per 4 spaces and warns on non-multiple-of-4 indentation.
• Arrays can only contain integers and are passed by value to functions.
• Array indices must be valid (no bounds checking yet - accessing out of bounds is undefined behavior).

License

MIT (see LICENSE)