/in/foo.c: In function 'main':
/in/foo.c:5:33: error: stray '\357' in program
  printf("请输入三个数：")；
                                 ^
/in/foo.c:5:34: error: stray '\274' in program
  printf("请输入三个数：")；
                                  ^
/in/foo.c:5:35: error: stray '\233' in program
  printf("请输入三个数：")；
                                   ^
/in/foo.c:6:5: error: expected ';' before 'scanf'
     scanf("%d,%d,%d",&a,&b,&c);
     ^~~~~