/in/foo.c:1:2: error: invalid preprocessing directive #�
 #年龄
  ^
/in/foo.c:2:1: error: unknown type name 'def'
 def main()
 ^~~
/in/foo.c: In function 'main':
/in/foo.c:3:1: error: expected declaration specifiers before 'if'
 if <2:
 ^~