Self-running source

Jump to navigation Jump to search


Set the executable bit on the following polyglot C/shell source file:

#if 0
gcc -Wall $0 && exec ./a.out; exit 1

#include <stdio.h>

int main(int argc, char *argv[])
        printf("Hello world!\n");
        return 0;

This is my favourite version because:

  • readable (e.g. no multiline comments)
  • minimal boilerplate
  • only runs the program if it compiled successfully
  • exits with 1 if there was an error

See also