// File: iotest2.cpp
// Simple I/O demonstration using << and >>.

#include <iostream>

using namespace std ;

int main() {

  cout << "Enter 2 numbers and I will add them" << endl ;
  
  while (1) {
     int n, m ;

     cout << "Enter two numbers or two zeroes to quit: " ;
     cin >> n >> m ;

     if ( (n == 0) && (m == 0) ) break ;

     cout << n << " + " <<  m << " = " << n + m << endl ;
  }

  cout << endl << "Good-bye!" << endl ;


}