/*******Piotr Wódz*******/
#include <iostream>
using namespace std;

class Cena {
private:
    float cenaNetto;
    float cenaBrutto;
    float vat;
    Cena (float x, float z)
    {
        vat = z;
        cenaBrutto = x + x * z;
        cenaNetto = x;
    }
    Cena (double y, double z)
    {
        vat = z;
        cenaBrutto = y;
        cenaNetto = y / (1 + z);
    }
public:
    void toStr() const;
    void toXML() const;
    static Cena fromNetto (float Netto, float VAT)
    {
        return Cena (Netto, VAT);
    }
    static Cena fromBrutto (float Brutto, float VAT)
    {
        return Cena ((double) Brutto, (double) VAT);
    }
};
    void Cena::toStr() const
    {
        cout << "podatek vat wynosi: " << vat << endl;
        cout << "cena netto wynosi: " << cenaNetto << endl;
        cout << "cena brutto wynosi: " << cenaBrutto << endl;
    }
    void Cena::toXML() const
    {
        cout << "<podatek vat> " << vat << " </podatek vat>" << endl;
        cout << "<cena netto> " << cenaNetto << " </cena netto>" << endl;
        cout << "<cena brutto> " << cenaBrutto << " </cena brutto>" << endl << endl;
    }

int main ()
{
    Cena zm = Cena::fromNetto (3.0, 0.23);
    zm.toStr();
    Cena::fromNetto (3.0, 0.23).toXML();
    Cena::fromBrutto (3.69, 0.23).toStr();
    Cena::fromBrutto (3.69, 0.23).toXML();
    system ("pause");
    return 0;
}