Chapter 11, Problem 31RQE

Program Plan Intro

Union:

• Union is a “user-defined” data type.
• The keyword used to define union is “union”.
• Member variables are declared inside union. They are accessed with the union name or union object.
• The size of union is the largest size of its data members.
• In union, changing the value of one member may affect other data members.
• Storage area is shared by individual data members.
• In Union, only the first data member can be initialized.

Declaration of Union:

The declarations of Union named “Items” with some data members are as follows:

//Union declaration

union Items

{

//Variable declarations

char alpha;

int num;

long int bigNum;

float real;

};