/in/foo.cc: In function 'int main()':
/in/foo.cc:27:16: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<x<<" "<<y<<endl;
                ^
/in/foo.cc:27:11: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<x<<" "<<y<<endl;
           ^~~