Swap value of data member of class using friend function
Swap two value of two classes using friend function
- Description :
Friend function access private data of class so we can use friend function as bridge between two classes.
#include<iostream.h>
#include<conio.h>
class B;
class A
{
int a;
public:
void getA()
{
cout<<"enter value of A : ";
cin>>a;
}
friend void swap(A &,B &);
};
class B
{
int b;
public:
void getB()
{
cout<<"enter value of B : ";
cin>>b;
}
friend void swap(A &,B &);
};
void swap(A &a1,B &b1)
{
int temp;
temp=a1.a;
a1.a=b1.b;
b1.b=temp;
cout<<"A = "<<a1.a;
cout<<"B = "<<b1.b;
}
void main()
{
A a1;
B b1;
a1.getA();
b1.getB();
swap(&a1,b1);
getch();
}
enter value of A : 10
enter value of B : 20
A = 20
B = 10
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