Class enumerations

An enumeration is a list of all the possible values in a logical collection. C++ enumerations are a great way of, well, enumerating things. For example, if our game uses variables, which can only be in a specific range of values, and if those values could logically form a collection or a set, then enumerations are probably appropriate to use. They will make your code clearer and less error-prone.

To declare a class enumeration in C++ we use two keywords, enum and class, together, followed by the name of the enumeration, followed by the values the enumeration can contain, enclosed in a pair of curly braces {...}.

As an example, examine this enumeration declaration. Note that it is conventional to declare the possible values from the enumeration all in uppercase:

enum class zombieTypes {REGULAR, RUNNER, CRAWLER, SPITTER, BLOATER }; 

Note, at this point, we have not declared any instances of zombieType, just the type itself. If that sounds odd, think about it like this: SFML...