C++ Inheritance

#include <iostream>
#include <string>
#include <vector>

using namespace std;

//Parent Class:
class Displayable{
public:
    virtual void display();
};

void Displayable::display(){
    cout << "OBJECT DISPLAYED\n\n";
}

//Subclass:
class Player : public Displayable{
public:
    virtual void display();
};

void Player::display(){
    cout << "PLAYER DISPLAYED\n\n";
}

//Subclass:
class Enemy : public Displayable{
public:
    virtual void display();
};

void Enemy::display(){
    cout << "ENEMY DISPLAYED\n\n";
}

int main(){

    vector<Displayable*> myGame;

    myGame.push_back(new Player());
    myGame.push_back(new Enemy());

    for(vector<Displayable*>::iterator iter = myGame.begin(); iter != myGame.end(); ++iter){
        (*iter)->display();
    }

    system("pause");
    return 0;
}