#include <iostream>

using namespace std;

class Comparable{
public:
    virtual int compare(Comparable &other) = 0;
};

class HighScoreElement : public Comparable{
private:
    string name;
    int score;
public:
    HighScoreElement();
    HighScoreElement(string name, int score);
    //HighScoreElement(Comparable &other);
    void Show();
    int compare(Comparable &other);
};

HighScoreElement::HighScoreElement() : name("Default"), score(0){}
HighScoreElement::HighScoreElement(string name, int score) : name(name), score(score){}
/*
HighScoreElement::HighScoreElement(Comparable &other){
    HighScoreElement el;

}
*/
void HighScoreElement::Show(){
    cout << "Name: " << name << ", Score: " << score << endl;
}
int HighScoreElement::compare(Comparable& other) {
    HighScoreElement *other_el = (HighScoreElement *)& other;
    if (score == other_el->score)
        return 0;
    else if (score > other_el->score)
        return 1;
    else
        return -1;
}

int main()
{
    cout << "Hello world!" << endl;

    HighScoreElement *he1 = new HighScoreElement("el1", 1);
    he1->Show();
    HighScoreElement *he2 = new HighScoreElement("el2", 2);
    he2->Show();

    cout << he1->compare(*he2);

    return 0;
}