Write a program to Find the size of a union

#include <stdio.h>
#include <conio.h>
union sample
 {
 int m;
 float n;
 char ch;
 };

void main()
 {
 
 union sample u;
 clrscr();

 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);

 getch();
 } /*End of main() */
/*-----------------------------------------
 Output
 The size of union =4
 25 12163373596672.000000
 -13107 0.200000 Õ
 -13200 0.199999 p
 ------------------------------------------*/

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