/in/foo.cc: In function 'int main(int, char**, char**)':
/in/foo.cc:37:6: warning: unused variable 'huihe' [-Wunused-variable]
  int huihe=0;
      ^~~~~
/in/foo.cc: In function 'int jiating(int*, int)':
/in/foo.cc:33:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^