/in/foo.c: In function 'main':
/in/foo.c:8:9: error: stray '\357' in program
   case 9：
         ^
/in/foo.c:8:10: error: stray '\274' in program
   case 9：
          ^
/in/foo.c:8:11: error: stray '\232' in program
   case 9：
           ^
/in/foo.c:9:3: error: expected ':' or '...' before 'printf'
   printf("A\n");
   ^~~~~~