#include<iostream>
#include<conio.h>
using namespace std;
class student
{
    public : int roll_no;
    void get()
    {
        cout<<"Enter student roll no:"<<endl;
        cin>>roll_no;
    }
    void put()
    {
        cout<<"Roll no:"<<roll_no<<endl;
    }
};
class test : public student
{
    public: int m1,m2;
    void getm()
    {
        cout<<"Enter m1 and m2 :"<<endl;
        cin>>m1>>m2;
    }
    void putm()
    {
        cout<<"Marks1: "<<m1<<endl;
        cout<<"Marks2: "<<m2<<endl;
    }
};
class result:public test
{
    public: float tot;
    void dis()
    {
        tot=m1+m2;
        cout<<"Total marks: "<<tot<<endl;
    }
};
int main()
{
    result D;
    D.get();
    D.put();
    D.getm();
    D.putm();
    D.dis();
    getch();
    return 0;
}