51) There are three classes manly institution, teacher and student. Class institution is super class. Class teacher is a base class and class student is a pure derived class. Class institution consist of name and pear of establishment. Class teacher contents department and number of classes and class student content roll no and grade. Write a program in C++ to inherit these class using multilevel inheritance?

#include<iostream.h>
#include<conio.h>
class institution
{
protected:
                char insname[20];
                int noy;
public:
                void getdata()
                {
                                cout<<"Enter Name of Institution:- ";
                                cin>>insname;
                                cout<<"Enter Establishment Year:- ";
                                cin>>noy;
                }
                void outdata()
                {
                                cout<<"\nName of Institution:- "<<insname;
                                cout<<"\nYear of Establishment:- "<<noy;
                }
};
class teacher:public institution
{
protected:
                char dept[20];
                int noc;
public:
                void getdata()
                {
                                institution::getdata();
                                cout<<"Enter Name of Department:- ";
                                cin>>dept;
                                cout<<"Enter Alloted Class:- ";
                                cin>>noc;
                }
                void outdata()
                {
                                institution::outdata();
                                cout<<"\nName of Department:- "<<dept;
                                cout<<"\nNo of Alloted Class:- "<<noc;
                }
};
class student:public teacher
{
private:
                int rn;
                char grade;
public:
                void getdata()
                {
                                teacher::getdata();
                                cout<<"Enter Roll No:- ";
                                cin>>rn;
                                cout<<"Enter Grade:- ";
                                cin>>grade;
                }
                void outdata()
                {
                                teacher::outdata();
                                cout<<"\nRoll No:- "<<rn;
                                cout<<"\nGrade:- "<<grade;
                }
};
void main()
{
                clrscr();
                student s;
                s.getdata();
                s.outdata();
                getch();
}

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