#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

class Figura
{
protected:
    double obwod{0};

public:
    virtual void oblicz_obwod()=0;
    virtual void wypisz() const=0;
    virtual ~Figura(){}
};

class Prostokat : public Figura
{
protected:
    double bok1;
    double bok2;

public:
    Prostokat(double, double);
    void wypisz() const override;
    virtual void ustaw_bok1(double);
    virtual void ustaw_bok2(double);
    void oblicz_obwod() override;
};

class Kwadrat : public Prostokat
{
public:
    Kwadrat(double);
    void wypisz() const override;
    void ustaw_bok1(double) override;
    void ustaw_bok2(double) override;
};

//================================================================

int main()
{
    srand(time(nullptr));
    Prostokat *tab[]=
    {
        new Prostokat(rand()%30-5,rand()%30-5),
        new Kwadrat(rand()%30-5),
        new Kwadrat(rand()%30-5),
        new Prostokat(rand()%30-5,rand()%30-5)
    };
    int rozmiar=sizeof(tab)/sizeof(*tab);
    for(int i=0; i<rozmiar; ++i)
    {
        cout<<"\n---------------------------------------------------------";
        cout<<"\n"<<i+1<<".\n";
        tab[i]->wypisz();
        cout<<"\nZmiany\n";
        tab[i]->ustaw_bok1((rand()%100-20)/10.0);
        tab[i]->ustaw_bok2((rand()%100-20)/10.0);
        tab[i]->wypisz();
    }
    cout<<"\n---------------------------------------------------------\n";
    for(int i=0; i<rozmiar; ++i)
        delete tab[i];

    return 0;
}

//================================================================

void Prostokat::wypisz() const
{
    if(this->bok1!=0 && this->bok2!=0)
    {
        cout<<"Prostokat o bokach: "<<this->bok1<<", "<<this->bok2<<"; ";
    }
    else
        cout<<"Blad!!! Boki prostokata: "<<this->bok1<<", "<<this->bok2<<"; ";
}

void Prostokat::ustaw_bok1(double x)
{
    if (x>0)
    {
        this->bok1=x;
    }
}

void Prostokat::ustaw_bok2(double x)
{
    if (x>0)
    {
        this->bok2=x;
    }
}

void Kwadrat::ustaw_bok1(double a)
{
    if(a>0)
    {
        bok1=a;
        bok2=a;
    }
}

void Kwadrat::ustaw_bok2(double a)
{
    if(a>0)
    {
        bok1=a;
        bok2=a;
    }
}

Prostokat::Prostokat(double a,double b)
    :bok1(a>0?a:0),bok2(b>0?b:0)
{ }

//skladowe Klasy Kwadrat
Kwadrat::Kwadrat(double arg)
    :Prostokat(arg,arg)
{}

void Kwadrat::wypisz() const
{

    if(this->bok1!=0 && this->bok1==this->bok2)
    {
        cout<<"Kwadrat o boku: "<<this->bok1<<"; ";
    }
    else
        cout<<"Blad!!! Boki kwadratu: "<<this->bok1<<", "<<this->bok2<<"; ";
}

void Prostokat::oblicz_obwod()
{
    obwod=bok1*bok2;
}