Pointer in Derived Class in C++

 

#include<bits/stdc++.h>

using namespace std;

class A{

    public:

    int base;

    void display(){

        cout<<"Base class variable is: "<<base<<endl;

    }

   

};

class B: public A{

     public:

    int Derived;

    void display(){

        cout<<"Base class variable is: "<<Derived<<endl;

    }

};

int main()

{

    A *base_c;

    B derived_ob;

   

    base_c = &derived_ob;

    base_c->base = 1;

    base_c->display();

    //changing the value      and they both will be print

   

    base_c->base = 3;

    base_c->display();

    B * dc;

    dc = &derived_ob;

    dc->Derived = 2;

    dc->display();

    return 0;

}