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; };

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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;

};

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