Chapter 11, Problem 9RQE

Program Plan Intro

Enumeration:

Enumeration is a user-defined data type which consists of enumerators; the enumerators are used to represent integer constants.

• An enumeration can be defined by using the keyword “enum”.
• By default, the values of enumeration type are filled with “0” to “n” sequentially and those default values can be changed when declaring the enumeration.

Syntax:

Syntax to declare an enumerated data type is as follows,

enum type_name {identifier_1, identifier_2, identifier_3, … identifier_n};

In the above syntax,

• “enum” is the keyword used to declare an enumerator.
• “type_name” refers the name of the type of the enumerator.
• “identier_1” to “identifier_n” are refers the list of the identifiers declared in the enumerator.

Example:

The example for enumeration is as follows,

//enum definition

enum Average

{

//values of enumeration

Semester_1 = 97,

Semester_2 = 99,

Semester_3 = 86,

Semester_4 = 97,

Semester_5 = 79,

Semester_6 = 88,

};

In the above example,

• The name of the enumeration is “Average”.
  • The “Semester_1”, “Semester_2”, “Semester_3”, “Semester_4”, “Semester_5”, and “Semester_6” are the six values of type “Average”.
  • The values of type “Average” are assigned with the new set of values.