/in/foo.cc: In function 'int gys(int, int)':
/in/foo.cc:28:2: warning: control reaches end of non-void function [-Wreturn-type]
  }
  ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:15:9: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<x; 
         ^