/in/foo.cc:14:8: error: stray '\357' in program
  case 2：
        ^
/in/foo.cc:14:9: error: stray '\274' in program
  case 2：
         ^
/in/foo.cc:14:10: error: stray '\232' in program
  case 2：
          ^
/in/foo.cc:29:12: error: stray '\357' in program
     default：
            ^
/in/foo.cc:29:13: error: stray '\274' in program
     default：
             ^
/in/foo.cc:29:14: error: stray '\232' in program
     default：
              ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:15:3: error: expected ':' before 'getchar'
   getchar();
   ^~~~~~~
/in/foo.cc:26:3: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else
   ^~~~
/in/foo.cc:28:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
    break;
    ^~~~~
/in/foo.cc:30:3: error: expected ':' before 'cin'
   cin>>n;
   ^~~