/in/foo.c: In function 'main':
/in/foo.c:6:12: error: expected expression before '%' token
 scanf("%d",%n);
            ^
/in/foo.c:9:8: error: stray '\357' in program
  case 9：
        ^
/in/foo.c:9:9: error: stray '\274' in program
  case 9：
         ^
/in/foo.c:9:10: error: stray '\232' in program
  case 9：
          ^
/in/foo.c:10:2: error: expected ':' or '...' before 'printf'
  printf("A\n");
  ^~~~~~