// Fig. 3.21: fig03_21.cpp
// References must be initialized
#include <iostream>

using std::cout;
using std::endl;

int main()
{
   int x = 3, &y = x;  // y is now an alias for x

   cout << "x = " << x << endl << "y = " << y << endl;
   y = 7;
   cout << "x = " << x << endl << "y = " << y << endl;

   return 0;
}


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