/in/foo.cc: In function 'int main()':
/in/foo.cc:29:17: warning: 'w' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<q<<' '<<w;
                 ^
/in/foo.cc:29:11: warning: 'q' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<q<<' '<<w;
           ^~~