x

#include <iostream>

using namespace std;

class Zwierze
{
    private:
    string gatunek;
    string ruch;
    string glos;

    public:
        virtual void daj_glos() = 0;
        virtual void pole() = 0;
};

class Pies : public Zwierze
{
    float a;
    public:
        Pies(float x)
        {
            a=x;
        }
        void daj_glos()
        {
            cout << "Hau hau!" << endl;
        }
        void pole()
        {
            cout << "Pole psa to: " << 4*a << endl;
        }
};

class Kot : public Zwierze
{
    float a;
    public:
        Kot(float x)
        {
           a=x;
        }
        void daj_glos()
        {
            cout << "Miau miau!" << endl;
        }
        void pole()
        {
            cout << "Pole kota to: " << a*a << endl;
        }

};

int main()
{
    Pies burek(2);
    Kot filek(2);

    Zwierze *wsk;

    wsk = &burek;
    wsk -> daj_glos();
    wsk -> pole();

    wsk = &filek;
    wsk -> daj_glos();
    wsk -> pole();

    return 0;
}