Write a C Program to demonstrate the difference between structure & union.

    
  /*Write a C Program to demonstrate the difference between structure & union. */


 
#include < stdio.h>
#include < string.h>
#include< conio.h>
// declaring structure
struct struct_example
{
	int integer;
	float decimal;
	char name[20];
};

// declaring union

union union_example
{
	int integer;
	float decimal;
	char name[20];
};

void main()
{
	 
	struct struct_example s={18,38," hc"};

	 
	union union_example u  ;

		
	printf("structure data:\n integer: %d\n decimal: %.2f\n name: %s\n",s.integer, s.decimal, s.name);
	printf("\nunion data:\n integer: %d\n decimal: %.2f\n name: %s\n",	u.integer, u.decimal, u.name);


	// difference two and three
	printf("\n sizeof structure : %ld \n", sizeof(s));
	printf(" sizeof union : %ld\n", sizeof(u));
	
	// difference five
	printf("\n Accessing all members at a time:");
	s.integer = 183;
	s.decimal = 90;
	strcpy(s.name, "geeksforgeeks");
	
	printf("structure data:\n integer: %d\n decimal: %.2f\n name: %s\n",s.integer, s.decimal, s.name);
	
	u.integer = 183;
	u.decimal = 90;
	strcpy(u.name, "geeksforgeeks");
	
	printf("\nunion data:\n integer: %d\n decimal: %.2f\n name: %s\n",			u.integer, u.decimal, u.name);
	
	printf("\n Accessing one member at time:");
	
	printf("\nstructure data:");
	s.integer = 240;
	printf("\ninteger: %d", s.integer);
	
	s.decimal = 120;
	printf("\ndecimal: %f", s.decimal);
	
	strcpy(s.name, "C programming");
	printf("\nname: %s\n", s.name);
	
	printf("\n union data:");
	u.integer = 240;
	printf("\ninteger: %d", u.integer);
	
	u.decimal = 120;
	printf("\ndecimal: %f", u.decimal);
	
	strcpy(u.name, "C programming");
	printf("\nname: %s\n", u.name);
	
	//difference four
	printf("\nAltering a member value:\n");
	s.integer = 1218;
	printf("structure data:\n integer: %d\n decimal: %.2f\n name: %s\n",s.integer, s.decimal, s.name);
	
	u.integer = 1218;
	printf("union data:\n integer: %d\n decimal: %.2f\n name: %s\n",			u.integer, u.decimal, u.name);
	getch():
}