Multilevel inheritance.

Write a c++ program to illustrate multilevel inheritance.

Program Code:

#include<iostream.h>

#include<conio.h>

class student

{

protected : int rollno;

public : void get_num();

void put_num();

};

void student::get_num()

{

cout<<"\nEnter the roll number:\t";

cin>>rollno;

}

void student::put_num()

{

cout<<"Rollnumber: "<<rollno;

}

class test:public student

{

protected : float sub1,sub2;

public:

void get_marks()

{

cout<<"\nEnter the sub1 marks: ";

cin>>sub1;

cout<<"\nEnter the sub2 marks: ";

cin>>sub2;

}

void put_marks()

{

cout<<"\nSub1="<<sub1;

cout<<"\nSub2="<<sub2;

}

};

class result : public test

{

float total;

public:

void display()

{

total=sub1+sub2;

put_num();

put_marks();

cout<<"\nTotal= "<<total;

}

};

int main()

{

clrscr();

result r;

r.get_num();

r.get_marks();

r.display();

getch();

return 0;

}

The output of the above program is:

Enter the roll number: 11111

Enter the sub1 marks: 67

Enter the sub2 marks: 56

Rollnumber: 11111

Sub1=67

Sub2=56

Total= 123

Thanks

Mukesh Rajput