/in/foo.cc:2:2: error: invalid preprocessing directive #includeb
 #includeb <cstdio>
  ^~~~~~~~
/in/foo.cc:12:10: error: stray '\357' in program
  return 0；
          ^
/in/foo.cc:12:11: error: stray '\274' in program
  return 0；
           ^
/in/foo.cc:12:12: error: stray '\233' in program
  return 0；
            ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:13:1: error: expected ';' before '}' token
 }
 ^
/in/foo.cc:8:7: warning: unused variable 'a' [-Wunused-variable]
  char a,b;
       ^