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C Program to Find the Size of a Union

C Program to Find the Size of a Union

- Define the union.
- Finds its size using keyword sizeof().
- Print the same and exit.

    #include <stdio.h>

    void main()

    {

        union sample

        {

            int   m;

            float n;

            char  ch;

        };

        union sample u;

        printf("The size of union = %d\n", sizeof(u));

        /*  initialization */

        u.m = 25;

        printf("%d %f %c\n", u.m, u.n, u.ch);

        u.n = 0.2;

        printf("%d %f %c\n", u.m, u.n, u.ch);

        u.ch = 'p';

        printf("%d %f %c\n", u.m, u.n, u.ch);

    }

- Define the union named sample.
- Declare three variables m, n and ch of different data types.
- Use the keyword sizeof() to find the size of a union and print the same.
- Initialize each variable with some value and print its value as output.
- Exit.

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