C program to find the size of a union.

C program to find the size of a union. Union is a collection of different data types like a structure but it gives the single piece of memory for all data types. In this program we use the sizeof() operator to find the size of union. sizeof() return the size of data types in bytes. Read more about C Programming Language .

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#include <stdio.h>

void main()
union sample
int m;
float n;
char ch;

union sample u;

printf("The size of union =%dn", sizeof(u));

/*initialization */

u.m = 25;
printf("%d %f %cn", u.m, u.n,u.ch);

u.n = 0.2;
printf("%d %f %cn", u.m, u.n,u.ch);

u.ch = 'p';
printf("%d %f %cn", u.m, u.n,u.ch);
} /*End of main() */
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