Klasa - Tacka-s9(zad3)

#include <iostream>
#include <cmath>

using namespace std;

class Tacka
{
    double x, y;

public:
    void Postavi(double x, double y) {Tacka::x = x; Tacka::y = y;}
    void PostaviPolarno(double ro, double theta);

    double DajX() const {return x;}
    double DajY() const {return y;}
    double DajRho()
    {
    return sqrt(x*x + y*y);
    }
    double DajTheta()
    {
    return (atan(y / x));
    }

    void Transliraj(double delta_x, double delta_y);

    void Rotiraj(double alpha);
    void Rotiraj(double alpha, Tacka &centar);



    void Ispisi()
    {
        cout << "X:" << x <<endl;
        cout << "Y:" << y << endl;
        cout << endl;
    }
    void IspisiPolarno()
    {
        cout << "Poluprecnik:" << DajRho()<< endl;
        cout << "Ugao:" << DajTheta()<<endl;
        cout << endl;
    }


    friend double Rastojanje(const Tacka &t1, const Tacka &t2);
};

void Tacka::PostaviPolarno(double ro, double theta)
{
    Tacka::x = ro / (sqrt(1 + tan(theta) * tan(theta)));
    Tacka::y = (ro * tan(theta)) / (sqrt(1 + tan(theta) * tan(theta)));
}

void Tacka::Transliraj(double delta_x, double delta_y)
{
    Tacka::x += delta_x;
    Tacka::y += delta_y;

}
void Tacka::Rotiraj(double alpha)
{
    double theta;
    theta -= alpha;
    double ro(Tacka::DajRho());
    Tacka::x = ro / (sqrt(1 + tan(theta) * tan(theta)));
    Tacka::y = (ro * tan(theta)) / (sqrt(1 + tan(theta) * tan(theta)));


}
void Tacka::Rotiraj(double alpha, Tacka &centar)
{
     double theta(atan(centar.y / centar.x));
     double ro(sqrt(centar.x * centar.x + centar.y + centar.y));
     theta -= alpha;
     centar.x = ro / (sqrt(1 + tan(theta) * tan(theta)));
     centar.y = (ro * tan(theta)) / (sqrt(1 + tan(theta) * tan(theta)));

}

double Rastojanje(const Tacka &t1, const Tacka &t2)
{
    return (sqrt((t1.x - t2.x) * (t1.x - t2.x) + (t1.y - t2.y) * (t1.y - t2.y)));
}



int main()
{
    Tacka t, n;
    t.Postavi(1, 1);

    t.Ispisi();

    n.PostaviPolarno(2, 45);
    n.IspisiPolarno();

    t.Transliraj(1, 1);
    t.Ispisi();

    n.Rotiraj(30);
    n.IspisiPolarno();

    Tacka centar;
    centar.Postavi(2, 2);
    centar.Rotiraj(30, centar);

    centar.Ispisi();

    double r(Rastojanje(t, n));

    cout << "Rastojanje: " << r;
    return 0;
}