45_virtual_class_exercise.cpp

#include <iostream>
using namespace std;

class Student
{
protected:
    int roll_no;

public:
    void set_number(int a)
    {
        roll_no = a;
    }
    void print_number(void)
    {
        cout << "The Roll no is: " << roll_no << endl;
    }
};

class Test : virtual public Student
{
protected:
    float maths, physics;

public:
    void set_marks(float m1, float m2)
    {
        maths = m1;
        physics = m2;
    }
    void print_marks(void)
    {
        cout << "Your marks is: " << endl
             << "Maths: " << maths << endl
             << "Physics: " << physics << endl;
    }
};

class Sports : virtual public Student
{
protected:
    float score;

public:
    void set_score(float sc)
    {
        score = sc;
    }
    void print_score(void)
    {
        cout << "Your PT score is: " << score << endl;
    }
};

class Result : public Test, public Sports
{
private:
    float total;
public:
    void display(){
        total=maths+physics+score;
        print_number();
        print_marks();
        print_score();
        cout<<"Your total score is: "<<total<<endl;
    }
};

int main()
{
    Result s;
    s.set_number(13);
    s.set_marks(78.3, 83.6);
    s.set_score(9);
    s.display();

    return 0;
}