(C++)wap of Swap The Two Number

#include<iostream.h>

#include<conio.h>

class abc;

class xyz

{

int a;

public:

void getdata()

{

cout<<”enter the value of a”;

cin>>a;

}

friend void compute (xyz,abc);

};

class abc

{

int b;

public:

void getdata()

{

cout<<”enter the value of b”;

cin>>b;

}

friend void compute(xyz,abc);

};

void compute (xyz m,abc n)

{

m.a=m.a-n.b;

n.b=m.a+n.b;

m.a=m.a-n.b;

cout<<”n After Swapping “;

cout<<”n Value of a : “<<m.a<<”n Value of b : “<<n.b;

}

main()

{

abc a2;

xyz a1;

clrscr();

a1.getdata();

a2.getdata();

compute(a1,a2);

getch();

}

Output

enter the value of a 15

enter the value of b 20

After Swapping

Value of a : 20

Value of b : 15