/in/foo.c:1:4: error: invalid preprocessing directive #age
   #age
    ^~~
/in/foo.c:2:4: error: unknown type name 'def'
    def main():
    ^~~
/in/foo.c: In function 'main':
/in/foo.c:2:14: error: expected declaration specifiers before ':' token
    def main():
              ^