Multilevel Inheritance Example.

 Multilevel Inheritance Example. 

#include<iostream>

#include<string.h>

using namespace std;

class student

{

    private:

      int rl;

      char nm[20];

    public:

       void read();

       void display();

};

class marks : public student

{

    protected:

      int s1;

      int s2;

      int s3;

    public:

       void getmarks();

       void putmarks();

};

class result : public marks

{

    private:

      int t;

      float p;

      char div[10];

    public:

       void process();

       void printresult();

};

void student::read()

{

    cout<<"Enter Roll no. : ";

    cin>>rl;

    cout<<"Enter Name : ";

    cin>>nm;

}

void student:: display()

{

    cout <<"\nRoll no. : "<<rl<<endl;

    cout<<"Name : "<<nm<<endl;

    cout<<"\n";

}

void marks ::getmarks()

{

    cout<<"Enter marks for 3  subjects : "<<endl;

    cin>>s1>>s2>>s3;

}

void marks ::putmarks()

{

    cout<<"Subject 1 :"<<s1<<endl;

    cout<<"Subject 2 : "<<s2<<endl;

    cout<<"Subject 3 : "<<s3<<endl;

}

void result::process()

{

    t= s1+s2+s3;

    p = t/3.0;

    p>=60?strcpy(div,"First"):p>=50?strcpy(div, "Second"): strcpy(div,"Third");

}

void result::printresult()

{

    cout<<"Total = "<<t<<endl;

    cout<<"\n";

    cout<<"Percentage  = "<<p<<endl;

    cout<<"Division = "<<div<<endl;

}

int main()

{

    result x;

    x.read();

    x.getmarks();

    x.process();

    x.display();

    x.putmarks();

    x.printresult();

    return 0;

}