SelectorProcedureV4

#include <iostream>
#include <math.h>

using namespace std;

class Ponto {

    // Access specifier
    private:

    // Coordenadas cartesianas
    float x = 0, y = 0;
    bool polar = false;

    // Access specifier
    public:

    // --- Procedimentos seletores ---

    float& getEntryA (){
        return x;
    }

    float& getEntryB (){
        return y;
    }

    bool& getCoordinate (){
        return polar;
    }

    // --------------------------------

    // entrada a e b em graus.
    Ponto (float a, float b, bool polarValue){
        x = a;
        y = b;
        polar = polarValue;
    }

    // Conversão para coordenadas polares:

    // arctan de (y/x)
    float getTeta (){
        if (polar == false){
            // IV quadrante:
            if (getEntryA() > 0 && getEntryB() < 0){
                return (atan2 (getEntryB(), getEntryA()) + (2*M_PI)) * 180/M_PI;
            }
            // II e III quadrante:
            else if ((getEntryA() < 0 && getEntryB() > 0) ||
                    (getEntryA() < 0 && getEntryB() < 0) ){
                return (atan2 (getEntryB(), getEntryA()) + (M_PI)) * 180/M_PI;
            }
            else{
                return atan2 (getEntryB(), getEntryA()) * 180/M_PI;
            }
        }
        else{
            return getEntryB();
        }
    }

    // raiz de (x² + y²)
    float getR (){
        if (polar == false){
            return (sqrt(pow (getEntryA(), 2) + pow (getEntryB(), 2)));
        }
        else {
            return getEntryA();
        }
    }

    // Conversão para coordenadas cartesianas:

    // x = r cosθ
    float getX (){
        if (polar == false){
            return getEntryA();
        }
        else{
            return (getEntryA()*cos((getEntryB()*(M_PI))/180));
        }
    }

    // y = r sinθ
    float getY (){
        if (polar == false){
            return getEntryB();
        }
        else{
            return (getEntryA()*sin((getEntryB()*(M_PI))/180));
        }
    }

    void showCoordinate(){
        cout << "X: " << getX()<< "\n";
        cout << "Y: " << getY()<< "\n";
        cout << "R: " << getR()<< "\n";
        cout << "Teta: " << getTeta()<< "\n\n";
    }
};

int main() {

    cout<<"Abstrações procedimentais: procedimento seletor\n";

    // Declare an object of class pointer
    Ponto ponto(7, 7, false);
    ponto.showCoordinate();

    // Can be: X, Y or R, Teta, respectively.
    ponto.getEntryA() = 9.89949;
    ponto.getEntryB() = 45;
    ponto.getCoordinate() = true;

    ponto.showCoordinate();


    // Can be: X, Y or R, Teta, respectively.
    ponto.getEntryA() = 19;
    ponto.getEntryB() = -25;
    ponto.getCoordinate() = false;

    ponto.showCoordinate();

    // Can be: X, Y or R, Teta, respectively.
    ponto.getEntryA() = 7;
    ponto.getEntryB() = 270;
    ponto.getCoordinate() = true;

    ponto.showCoordinate();

}