Program to perform addition and subtraction using inheritance in C++

Problem:- Write a program to perform addition and subtraction using inheritance. (single inheritance, multiple inheritance, multilevel type inheritance)

#include <iostream>

using namespace std;

class numbers{

    protected:

    int x,y;

    public:

    void input(){

        cout<<"Enter the first no.";

        cin>>x;

        cout<<"Enter the second no.";

        cin>>y;

    }

    void display(){

        cout<<"first no.:";

        cout<<x<<endl;

        cout<<"second no.:";

        cout<<y<<endl;

    }

};

class calculate: public numbers{

    public:

    int result;

    void addition(){

        result=numbers::x+numbers::y;

        cout<<"The sum is:";

        cout<<result<<endl;

    }

    void substraction(){

        result=numbers::x-numbers::y;

        cout<<"The difference is:";

        cout<<result<<endl;

    }

};

int main()

{

    calculate pair;

    pair.input();

    pair.display();

    pair.addition();

    pair.substraction();

    return 0;

}