C++ Part 20

An enumeration type is a type whose values are defined by a list of constants of typeint. An enumeration type is very much like a list of declared constants. 

enum MonthLength { JAN_LENGTH = 31, FEB_LENGTH = 28, MAR_LENGTH = 31, APR_LENGTH = 30, MAY_LENGTH = 31, JUN_LENGTH = 30, JUL_LENGTH = 31, AUG_LENGTH = 31, SEP_LENGTH = 30, OCT_LENGTH = 31, NOV_LENGTH = 30, DEC_LENGTH = 31 };

enum Direction { NORTH = 0, SOUTH = 1, EAST = 2, WEST = 3 }; is equivalent to enum Direction { NORTH, SOUTH, EAST, WEST };