A final way to provide constants is to use an enum variable. In effect, an enum is a group of named constants, which means that you can use an enum as a parameter to a function. For example:
enum suits {clubs, diamonds, hearts, spades};
This defines an enumeration called suits, with named values for the suits in a deck of cards. An enumeration is an integer type and by default the compiler will assume an int, but you can change this by specifying the integer type in the declaration. Since there are just four possible values for card suits, it is a waste of memory to use int (usually 4 bytes) and instead we can use char (a single byte):
enum suits : char {clubs, diamonds, hearts, spades};
When you use an enumerated value, ...
