DSA-cpp/virtualFunc.cpp at main · imraghavagr/DSA-cpp · GitHub

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#include<iostream>
using namespace std;
class A{
public:
    int a;
    void hello(){
        cout<<"hello A"<<endl;
    }
    virtual void bye(){
        cout<<"bye A"<<endl;
    }
};
class B : public A{
public:
    virtual void bye(){
        cout<<"bye B"<<endl;
    }
        void hello(){
        cout<<"hello B"<<endl;
    }
};
class C : public A{
public:
    virtual void bye(){
        cout<<"bye C"<<endl;
    }
    void hello(){
        cout<<"hello C"<<endl;
    }
};
int main()
{

    A a;
    A *p;
    p = &a;

    p->bye();

    B b;
    C c;
    p = &b;
    //function overriding in a dynamic way using virtual functions
    p->bye();

    p = &c;
    p->bye();


    a.hello();

    b.hello();

    c.hello();


    p->hello();
    return 0;
}