#include <iostream>
using namespace std;

int main() {
    int a {99};

    int &b{a};

    cout << " a = " << a << endl;
    cout << " b = " << b << endl;

    b = 42;

    cout << endl << endl;
    cout << " a = " << a << endl;
    cout << " b = " << b << endl;



    return 0;
}