/in/foo.cc: In function 'int main()':
/in/foo.cc:56:24: warning: 'rey' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<rex+1<<' '<<rey+1;
                        ^
/in/foo.cc:56:15: warning: 'rex' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<rex+1<<' '<<rey+1;
               ^~~