/in/foo.c:2:5: error: expected identifier or '(' before 'return'
    2 |     return 0;
      |     ^~~~~~
/in/foo.c:3:1: error: expected identifier or '(' before '}' token
    3 | }#include <stdio.h>
      | ^
/in/foo.c:3:2: error: stray '#' in program
    3 | }#include <stdio.h>
      |  ^
/in/foo.c:3:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    3 | }#include <stdio.h>
      |           ^