Character arrays, structures and unions

This program covers character arrays, structures, and unions - three VERY powerful features of C++. The first part, character arrays, explains and demostrates the use of the [] operators when dealing with strings. The second part, structures, demostrates the use of structures in real-world applications and defines the differences/similarities between structures and classes. The third and final part, unions, identifies the word 'unions' as a keyword, shows how their used and gives a copy-and-pastable example.