/in/foo.cc: In function 'int main()':
/in/foo.cc:29:33: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout << x + 1 << ' ' << y + 1;
                                 ^
/in/foo.cc:29:22: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout << x + 1 << ' ' << y + 1;
                      ^~~