Program #11: To Swap Two Numbers Without Using 3rd Variable

C Language

#include<stdio.h>
#include<conio.h>
void main() 
{
    int a, b;
    clrscr();
    printf("Enter a");
    scanf("%d", &a);
    printf ("Enter b");
    scanf ("%d", &b);
    a=a+b;
    b=a-b;
    a=a-b;
    printf("After swaping a = %d", a);
    printf("b =  %d",b);
    getch();
}

/*OUTPUT*/
Enter a 100
Enter b 200
After swapping a = 200  b = 100