operator:
std::ostream& operator<<(std::ostream& output, Macierz2x2 input)
{
    output << input.wsp(1,1) << " " << input.wsp(2,1) << "\n" << input.wsp(1,2) << " " << input.wsp(2,2);
    return output;
}

deklaracja (do operator.hpp):
std::ostream& operator<<(std::ostream&, Macierz2x2);

definicja (do operator.cpp):
std::ostream& operator<<(std::ostream& output, Macierz2x2 input)
{
    output << input.wsp(1,1) << " " << input.wsp(2,1) << "\n" << input.wsp(1,2) << " " << input.wsp(2,2);
    return output;
}