Initial Query

Write a single file that I can save as foo.c.py that I can run as either a C program or a python program, and so both will print "hello world". Specifically if I run `python foo.c.py` or `gcc foo.c.py && ./a.out` I should see "hello world" printed to the console.

LLM Generation

Query

Output

# Polyglot "Hello World" for C and Python Here's a file that works both as a C program and a Python program, printing "hello world" in either case:

#include <stdio.h>
#define print(x) int main() { puts(x); return 0; }
print("hello world") #;

## How it works: ### As a Python program: When run with `python foo.c.py`: - Lines starting with `#` are comments in Python, so the first two lines are ignored - The third line executes Python's built-in `print()` function with "hello world" - The `#;` at the end is also a comment in Python ### As a C program: When compiled and run with `gcc foo.c.py && ./a.out`: - `#include <stdio.h>` includes the standard I/O library - The `#define` line creates a macro that defines a complete main function - When preprocessing, `print("hello world")` expands to `int main() { puts("hello world"); return 0; }` - The `#;` is a C preprocessor line comment (ignored) The trick relies on Python treating C preprocessor directives as comments, while still allowing both languages to interpret the `print("hello world")` line in a meaningful way.

Extract Code

I extracted the following code from that output:

#include <stdio.h>
#define print(x) int main() { puts(x); return 0; }
print("hello world") #;

Check if all of the following conditions are true:

Run Code Interpreter

Running the following program:

#include <stdio.h>
#define print(x) int main() { puts(x); return 0; }
print("hello world") #;

And got the output:

main.c:4:22: error: stray '#' in program
    4 | print("hello world") #;
      |                      ^
main.sh: line 2: ./a.out: No such file or directory

Substring Evaluation

Testing if the previous output contains the string hello world: True

Run Code Interpreter

Running the following program:

#include <stdio.h>
#define print(x) int main() { puts(x); return 0; }
print("hello world") #;

And got the output: hello world

Substring Evaluation

Testing if the previous output contains the string hello world: True

Final Answer: True

Initial Query

LLM Generation

Query

Output

# Polyglot C/Python Hello World I'll create a file that works as both a valid C program and a valid Python program, printing "hello world" in both cases:

#if 0
print("hello world")
"""
#endif

#include <stdio.h>

int main() {
    printf("hello world\n");
    return 0;
}

// """

## How this works: When run as Python: - `#if 0` is treated as a comment (starts with `#`), so it's ignored - `print("hello world")` executes and prints "hello world" - `"""` starts a multi-line string that continues until the matching `"""` at the end - Everything after `print()` up to the closing `"""` is just a string, not executed code When compiled and run as C: - `#if 0` begins a conditional compilation block that is always skipped - Everything between `#if 0` and `#endif` (including the Python code) is ignored - The regular C program with `#include` and `main()` is compiled and run - The final `// """` is just a comment in C Save this as `foo.c.py` and you can use it with both Python and C as requested!

Extract Code

I extracted the following code from that output:

#if 0
print("hello world")
"""
#endif

#include <stdio.h>

int main() {
    printf("hello world\n");
    return 0;
}

// """

Check if all of the following conditions are true:

Run Code Interpreter

Running the following program:

#if 0
print("hello world")
"""
#endif

#include <stdio.h>

int main() {
    printf("hello world\n");
    return 0;
}

// """

And got the output:

hello world
main.c:4:3: warning: missing terminating " character
    4 | """
      |   ^

Substring Evaluation

Testing if the previous output contains the string hello world: True

Run Code Interpreter

Running the following program:

#if 0
print("hello world")
"""
#endif

#include <stdio.h>

int main() {
    printf("hello world\n");
    return 0;
}

// """

And got the output: hello world

Substring Evaluation

Testing if the previous output contains the string hello world: True