/in/foo.cc:15:9: warning: missing terminating " character
  printf("%d\n, sum);
         ^
/in/foo.cc:15:9: error: missing terminating " character
  printf("%d\n, sum);
         ^~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:6:17: error: 'xin' was not declared in this scope
  scanf("%d%d", &xin,&xmax);
                 ^~~
/in/foo.cc:16:2: error: expected primary-expression before 'return'
  return 0
  ^~~~~~