/in/foo.cc: In function 'int main()':
/in/foo.cc:22:32: warning: 'i2' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout << i1 - 1 << " " << i2 - 1;
                                ^
/in/foo.cc:22:20: warning: 'i1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout << i1 - 1 << " " << i2 - 1;
                    ^~~