#include <iostream>

#include <cstdlib>



using namespace std;



int main(int argc, char **argv) {

  int x = 5, y = 10;

  int& z = x;  // binds the name "z" to variable x



  z += 1;  // sets z (and thus x) to 6

  x += 1;  // sets x (and thus z) to 7



  z = y;   // sets z (and thus x) to 10 (the value of y)

  z += 1;  // sets z (and thus x) to 11



  cout << "x: " << x << "; y: " << y << "; z: " << z << endl;

  return EXIT_SUCCESS;

}