Class Program 2

Write a C++ program to swap the value of private data members from 2 different classes.

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#include<iostream>

using namespace std;

class xyz;

class abc

{

             int a;

public:

            void seta()

            {

                        a=5;

            }

            void printa()

            {

                        cout<<a<<endl;

            }

            friend void swap(abc &,xyz &);

};

class xyz

{

             int x;

public:

            void setx()

            {

                        x=10;

            }

            void printx()

            {

                        cout<<x<<endl;

            }

            friend void swap(abc &,xyz &);

};

void swap(abc &obj1,xyz &obj2)

{

            int t;

            t=obj1.a;

            obj1.a=obj2.x;

            obj2.x=t;

}

void main()

{

            abc o1;

            xyz o2;

            o1.seta();

            o2.setx();

            cout<<"\n Before swap";

            o1.printa();

            o2.printx();

            swap(o1,o2);

            cout<<"\n After swap";

            o1.printa();

            o2.printx();

}