/in/foo.cc: In function 'int main()':
/in/foo.cc:4:17: error: expected initializer before '-' token
  int n,hello,liu-baoo-bao!;
                 ^
/in/foo.cc:4:8: warning: unused variable 'hello' [-Wunused-variable]
  int n,hello,liu-baoo-bao!;
        ^~~~~