figura zle xD

#include <iostream>
#include <string>

using namespace std;

class figura {
public:
    virtual double pole()const = 0;
    virtual ostream& wyswietl(ostream& out)const = 0;
    virtual ~figura() {}
};

class kolo : public figura {
    string* txt;
    double l;
public:
    kolo() :txt(new string("brak")), l(0) {}
    kolo(const string& a1, const double& a2) :txt(new string(a1)), l(a2) {}
    kolo(const kolo& r) :txt(new string(*r.txt)), l(r.l) {}

    kolo& operator=(const kolo& r) {
        if (this != &r) {
            delete txt;
            txt = new string(*r.txt);
            l = r.l;
        }return *this;
    }

    double pole() const { return 3.14 * l * l; }

    ostream& wyswietl(ostream& out)const { return out << *txt << " " << l; }

    ~kolo() { delete txt; }
};

class prost : public figura {
protected:
    string* txt;
    double a;
    double b;
public:
    prost() :txt(new string("brak")), a(0), b(0) {}
    prost(const string& a1, const double& a2, const double& a3) :txt(new string(a1)), a(a2), b(a3) {}
    prost(const prost& r) :txt(new string(*r.txt)), a(r.a), b(r.b) {}

    prost& operator=(const prost& r) {
        if (this != &r) {
            delete txt;
            txt = new string(*r.txt);
            a = r.a;
            b = r.b;
        }return *this;
    }

    double pole()const { return a * b; }



    ostream& wyswietl(ostream& out)const { return out << *txt << " " << a << " " << b; }

    ~prost() { delete txt; }
};

class prostop : public prost {
    double h;
public:
    prostop() :prost(), h(0) {}
    prostop(const string& a1, const double& a2, const double& a3, const double& a4) :prost(a1, a2, a3), h(a4) {}
    prostop(const prostop& r) :prost(r), h(r.h) {}

    double pole()const { return 2 * a * b + 2 * a * h + 2 * b * h; }



    ostream& wyswietl(ostream& out)const { return out << *txt << " " << a << " " << b << " " << h; }
};



ostream& operator<<(ostream& out, const figura& r) {
    return r.wyswietl(out) << endl;
}
int main()
{
    figura* tab[5];
    const kolo test1("czarny", 100);
    const prost test2("szary", 2.2, 2);

    tab[0] = new kolo("czerwony", 100);
    tab[1] = new kolo;
    tab[2] = new prost("niebieski", 1, 1);
    tab[3] = new prostop("zielony", 1, 1, 1);
    tab[4] = new prostop;

    for (int i = 0; i < 5; ++i) {
        cout << tab[i]->pole() << endl;
    }
    cout << "************* 3 ************" << endl;

    for (int i = 0; i < 5; ++i) {
        cout << *tab[i] << tab[i]->pole() << endl;
        delete tab[i];
    }

    cout << "************* 4 ************" << endl;




    cout << "************* 5 ************" << endl;
    return 0;
}