/in/foo.c: In function 'main':
/in/foo.c:4:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '\U0000ff0c'
    4 | {int x ， y ；
      |        ^~
/in/foo.c:4:8: error: unknown type name '\U0000ff0c'
/in/foo.c:4:13: error: expected '=', ',', ';', 'asm' or '__attribute__' before '\U0000ff1b'
    4 | {int x ， y ；
      |             ^~
/in/foo.c:6:17: error: expected ')' before 'x'
    6 |      printf("d%" x+y);
      |            ~    ^~
      |                 )
/in/foo.c:6:15: warning: spurious trailing '%' in format [-Wformat=]
    6 |      printf("d%" x+y);
      |               ^