#ifndef trylab_class_h
#define trylab_class_h
#include "math.h"
using namespace std;
const double PI=3.14159265;
class Nefroida{ //класс Нефроида
    private :
    double a; //радиус
    double alpha; //альфа
    double nx;
    double ny;
public:
    Nefroida(){//конструктор
        a=0;
        alpha=0;
        nx=0;
        ny=0;
    }

    double geta()const{return a;};

    void seta(double na){
        try{
            if(na>0)
                a=na;
            else
                throw "illegal a";
        }
    catch(const char *p){
        cout<<"Brat za brata"<<endl;
    }
    }

    double getalpha()const{return alpha;};

    void setalpha(double nalpfa){
        alpha=(nalpfa/PI)*180;

    }
    double getnX()const{return nx;}
    double getnY()const{return ny;}

    void setnX(double newx){
        nx=newx;
    }
    void setnY(double newy){
        ny=newy;
    }
    int setXY(){
        double x;
        std::cout<<"Vvedite x = ";//<<std::endl;
        std::cin>>x;
        try{
            if (x!=geta())
                nx=x;
            else
                throw "illegal x";
                }
            catch(const char *p){
                cout<<"Неверное значение x=a"<<endl;
        };
            try{
                if(((a+nx)/(a-nx))>0)
                    ny=nx*sqrt((a+nx)/(a-nx));
                else
                    throw "illegal sqrt";
            }
            catch(const char *p){
                    cout<<"Неверное значение x<a"<<endl;
            }
        return ny;
    }


    double getlength(double alpha){
        double len;
        alpha=(alpha/PI)*180;
        len=-((a*cos(2*alpha))/(cos(alpha)));
        return len;
    }



   /* double getX(double fi){
		double x=3*a*cos(fi)-a*cos(alpha+3*fi);
		return x;
	}*/

    double getX()const{return nx;}

	double getY(){
        double y;
        double x = getX();
        y=(x*sqrt((a+x)/(a-x)));
		return y;
	}

    double getArea(){
        double Area=a*a*(2-PI/2);
        return Area;
    }
    double getArea2(){
        double Area2=a*a*(2+PI/2);
        return Area2;
    }
    double getVolume(){
        double volume=PI*a*a*a*(2*log(2)-(4/3));
        return volume;
    }
    double getcurvate(){
        double curv;
        curv = a*sqrt(2);
        return curv;
    }
    //void form(){

    //}

};


#endif