/in/foo.c: In function 'main':
/in/foo.c:6:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'scanf'
    6 |         scanf("%d,%d,%d",&a,&b,&c);
      |         ^~~~~
/in/foo.c:8:17: error: 'd' undeclared (first use in this function)
    8 |                 d=a+b+c;
      |                 ^
/in/foo.c:8:17: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:12:37: error: expected ';' before '\U0000ff1b'
   12 |                 printf("输入不合法")；
      |                                     ^~
      |                                     ;