Write a Program to Swap Values of Two Variables Without using 3rd Variable.

/*Program to Swap Values of Two Variables Without using 3rd Variable*/
#include <stdio.h>
main()
{
int a, b, temp;
printf(“\nEnter any two numbers: “);
scanf(“%d %d”, &a, &b);
printf(“\n\nBefore Swapping:\n”);
printf(“\na = %d\n”, a);
printf(“\nb = %d\n”, b);
a = a + b;
b = a – b;
a = a – b;
printf(“\n\nAfter Swapping:\n”);
printf(“\na = %d\n”, a);
printf(“\nb = %d\n”, b);
getch();
}