Run Time Polymorphism ( Function override )

 #include<iostream>;

using namespace std;

class A {

    public:
        virtual void Sum() {
        cout << "Class A Sum" << endl;
    }

};


class B :public A {
    public:
        void Sum() override {
        cout << "Class B Sum" << endl;
    }
};


int main() {

    B obj;
    obj.Sum();//Early Binding

    //A obj2;
    //obj2.Sum();//Early Binding

    A* p;
    p = &obj;//B 
    p->Sum();// call A

    return 0;
}

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