cpp program swap two numbers by bitwise,multiple and addition

 cpp program swap two numbers 

Swapping the two number is a tricky task in cpp programming language,In this example,swap two numbers with the help of bitwise operators, addition and subtraction, and multiplication. 

Swap two number by addition and subtraction

#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<<endl<<"b ="<<b;

    return 0;

}

Output:

a=20

b=10

in the above example,a+b is equal to 30 and store in the a variable then a-b is assigned to the variable due to 30-20 is equal to 10 then a-b is assign to the a due to 30-10 is equal to 20.

Swap two number by multiplication and division

#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<<endl<<"b ="<<b;

    return 0;

}

Ouptut:

a=20

b=10

swap two number by bitwise operators

#include<iostream>

using namespace std;

int main()

{

    int var1,var2;

    var1=10;

    var2=20;

    var1=var1^var2;

    var2=var1^var2;

    var1=var1^var2;

    cout<<"var1 ="<<var1<<" var2="<<var2;

    return 0;

}

Output:

var1 =20 var2=10