Question 3

Take your Pair2<T> class from Question 2 and add a new method swap() that exchanges the two stored values. In other words, when swap() is called, the original first moves into second and the original second moves into first, using a temporary variable of type T to perform the exchange.

Why This Matters

Sometimes you need to reverse or swap the two values stored in a pair without creating a brand-new object. By adding swap(), you let the same Pair2<T> instance flip its contents in place, which can be more efficient than reconstructing a new pair.

Original Pair2<T> Definition for Reference

Below is the Pair2<T> class from Question 2 so you do not need to open that file. We will modify this into a new class called Pair3<T> by adding a swap() method.