/in/foo.cc: In function 'int main()':
/in/foo.cc:25:8: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<y<<endl;
        ^
/in/foo.cc:24:8: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<x<<endl;
        ^