NCP7.BAK

// wirte a cpp program to swap the vale of private data member from 2 diffrent classes
#include<iostream.h>
#include<conio.h>
class two;
class one
{
	int a;
	public:
	one(int x)
	{
		a=x;
	}

	void disp()
	{
		cout<<a;
	}

	friend void swap(one &,two &);
};

class two
{
	int b;
	public:
	two(int y)
	{
		b=y;
	}

	void disp()
	{
		cout<<b;
	}

	friend void swap(one &,two &)
};

void swap(one &o1,two &o2)
{
	int temp=0;
	temp=o1.a;
	o1.a=o2.b;
	o2.b=temp;

	cout<<"\n1:"<<o1.a;
	cout<<"\n2:"<<o2.b;
}

void main()
{
	int a,b;
	clrscr();
	cout<<"enter the number 1:";
	cin>>a;
	one o1(a);

	cout<<"enter the number 2:";
	cin>>b;
	two o2(b);

	cout<<"before swapping:";
	cout<<"\n1 :";o1.disp();
	cout<<"\n2 :";o2.disp();

	cout<<"\n after swapping :";
	swap(o1,o2);

	cout<<"\n after swapping:";
	cout<<"\n1:";o1.disp();
	cout<<"\n2:";o2.disp();
	getch();
}                                                            x
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