Friend Function in c and c++ to use data of private Classes with example

Friend Function

Command use to link private classes which have no link or inheritance with other.

Friend word is use to share data f such type of classes data.

Friend Function in c and c++ to use data of private Classes with example

Program:-------

#include<iostream>

using namespace std;

class B;

class A

{

                private:

                                int a;

                                public:

                                                A()

                                                {

                                                                a=10;

                                                }

                                                friend void add(A ,B);

                                               

};

class B

{

  private:

                int b;

                public:

                                B()

                                {

                                                b=5;

                                  }

friend void add(A  , B);  

};

 void add(A obj1 , B obj2)

{

                int s;

                s = obj1.a + obj2.b;

                cout<<"\n Sum Of "<<obj1.a<<"and "<<obj2.b<<"="<<s<<endl;

}

int main()

{

                A a1;

                B b1;

     add(a1 , b1);

                return 0;

}