Ex 7B...Friend Class.cpp

#include<iostream>
#include<conio.h>
using namespace std;
class student
{
    char name[20];
    int mark1,mark2,mark3;
    friend class friendclass;
    public:
        void get_data()
        {
            cout<<"\nEnter name:";
            cin>>name;
            cout<<"\nEnter 3 marks:";
            cin>>mark1>>mark2>>mark3;
            }
            void display(int a)
            {
                cout<<"\nOutput\n ";
                cout<<"=============\n";
                cout<<"\nName ="<<name;
                cout<<"\nAverage ="<<a;
                }
                };
                class friendclass
                {
                    public:
                        void mark_avg(student &stud)
                        {
                            int avg=(stud.mark1+stud.mark2+stud.mark3)/3;
                            stud.display(avg);
                            }
                            };
                            int main()
                            {
                                student s;
                                s.get_data();
                                friendclass obj;
                                obj.mark_avg(s);
                                getch();
                                }