practice polimorfismo, herencia, opp

#include <iostream>
using namespace std;

class A {
    public:
    virtual int calcula (){
        return 1;
    };
};


class B:public A{
    public:
    virtual int calcula (){
        return 2;
    }
};

class C:public B{
    public:
    virtual int calcula (){
        return 3;
    }
};

int main () {
   int Result = 0;
   A *Objs [3];
   Objs [0] = new A ();
   Objs [1] = new B ();
   Objs [2] = new C ();
   for (int i = 0; i <3; i ++)
         Result += Objs [i] -> calcula ();
    cout << Result << endl;
    return 0;
}