#include <iostream>

using namespace std;

int main()  {

    int a {7};
    int & b {a};

    cout << "a = " << a << endl;
    cout << "b = " << b << endl;
    cout << "setting b to 99 " << endl;
    b = 99;

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

    return 0;
}