swap values of two variables, don't use 3rd variable

//example 1

#include <iostream>

#include <conio.h>

void main()

{

int a =10 , b =45;

*(&a+1 ) = a;

a =b;

b =*(&a +1);

}

// Example 2

#include <stdio.h>

int main()

{

    int a, b;

    printf("Enter A :");

    scanf("%d",&a);

    printf("Enter B :");

    scanf("%d",&b);

    a ^= b;

    b ^= a;

    a ^= b;

    printf("\nValue of A=%d B=%d ",a,b);

    return 1;

}

swap values of two variables

swap values of two variables using three variables

c programs