C++ Program to Swap Two Numbers Using Bitwise Operator

C++ Program to Swap Two Numbers Using Bitwise Operator

/*C++ Program to Swap Two Numbers Using Bitwise Operator*/

#include<iostream>

using namespace std;

int main()

{

    int a,b,t;

    a=10;

    b=20;

    t=a^b;

    b=b^t;

    a=t^b;

    cout<<"a="<<a<<" b="<<b;

    return 0;

}

OUTPUT:

a=20 b=10

EXPLANATION:

When t=a^b statement is executing, XOR operation between variable a (value 10) and b (value 20) is performed and result is stored in variable t. Result of XOR between 10 and 20 is 30, thus 30 is stored in variable t.

When b=b^t statement is executing, XOR operation between b (value 20) and t (value 30) is performed and result is stored in variable b. Result of XOR between 20 and 30 is 10, thus 10 is stored in variable b.

When a=t^b statement is executing, XOR operation between t (value 30) and b (value 10) is performed and result is stored in variable a. Result of XOR between 30 and 10 is 20, thus 20 is stored in variable a.

Then, value of a and b is print on monitor using cout statement.

C++ Program to Swap Two Numbers Using Bitwise Operator Without Third Variable.

/*C++ Program to Swap Two Numbers Using Bitwise Operator Without Third Variable*/

#include<iostream>

using namespace std;

int main()

{

    int a,b;

    a=10;

    b=20;

    a=a^b;

    b=a^b;

    a=a^b;

    cout<<"a="<<a<<" b="<<b;

    return 0;

}

OUTPUT:

a=20 b=10