This program illustrates the swap() member function for vector objects.
Press Enter to continue ...

For v1 we have:
Size = 5  Capacity = 5
Contents: 5 5 5 5 5
Press Enter to continue ...

For v2 we have:
Size = 10  Capacity = 10
Contents: 10 10 10 10 10 10 10 10 10 10
Press Enter to continue ...

Now we swap v1 and v2 with v1.swap(v2) and redisplay.
Press Enter to continue ...

For v1 we have:
Size = 10  Capacity = 10
Contents: 10 10 10 10 10 10 10 10 10 10
Press Enter to continue ...

For v2 we have:
Size = 5  Capacity = 5
Contents: 5 5 5 5 5
Press Enter to continue ...

Now we change the capacities and swap again with the following code sequence
to observe how the capacities are "carried along" during the swap:
v1.reserve(12);
v2.reserve(7);
v2.swap(v1);
Press Enter to continue ...

For v1 we have:
Size = 5  Capacity = 7
Contents: 5 5 5 5 5
Press Enter to continue ...

For v2 we have:
Size = 10  Capacity = 12
Contents: 10 10 10 10 10 10 10 10 10 10
Press Enter to continue ...