Chapter 11, Problem 55RQE

Program Plan Intro

Union:

In C++, the union is a user-define data type, which contains different type of elements with different lengths.

• It uses single memory location to hold more than one variable. It takes the memory of the largest data type.
• It conserves memory as it stores all the members in the same memory location.

Declaration of union:

The declaration of union is the same as a structure with the only difference that, instead of using a keyword “struct”, the keyword “union” should be used.

Example:

union Score

{

int rollNo;

float marks;

};