lab_1: class_otrezok

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

using namespace std;

struct Point
{
public:
    double x, y;
};

class otrezok {
private:
    double aX,aY,bX,bY;
public:

    otrezok(double ax, double ay, double bx, double by)
    {
        this->aX = ax;
        this->aY = ay;
        this->bX = bx;
        this->bY = by;
    }

    void ToConsole()
    {
            cout<<"Otrerzok ("<<aX<<","<<aY<<") - ("<<bX<<","<<bY<<")"<<endl;
    }

    bool Equals (otrezok Drugoi_otrezok)
    {
        return this->Lenght()==Drugoi_otrezok.Lenght();
    }

    int Lenght()
    {
        return sqrt( (bX - aX)*(bX - aX) + (bY - aY) * (bY - aY) );
    }

    int CompareTo(otrezok Drugoi_otrezok)
    {
        if(this->Equals(Drugoi_otrezok))
            return 0;
        else
            return this->Lenght() > Drugoi_otrezok.Lenght();
    }

    Point Intersect(otrezok O)
    {
        Point toReturn;
        toReturn.x = 0;
        toReturn.y = 0;

        double t = 0;

        t = - (  (O.aX - this->aX) * (this->aY - this->bY) + (O.aY - this->aY ) * (this->bX - this->aX)  )/
                ( (O.bX - O.aX ) * (this->aY - this->bY) + ( O.bY - O.aY ) * (this->bX - this->aX) );

        if(t >= 0 && t <= 1)
        {
            toReturn.x = O.aX + t * (O.bX - O.aX);

            toReturn.y = O.aY + t * (O.bY - O.aY);
            return toReturn;
        }
        else
        {
            cout<<"NET TOCHKI PERESECHENIYA"<<endl;
            return toReturn;
        }
       }

       double Distance (otrezok Drugoi_otrezok)
{
	double first = Distance_between_2_points(this->aX, this->aY, Drugoi_otrezok.aX, Drugoi_otrezok.aY);
	double second = Distance_between_2_points(this->aX, this->aY, Drugoi_otrezok.bX, Drugoi_otrezok.bY);

	double third = Distance_between_2_points(this->bX, this->bY, Drugoi_otrezok.aX, Drugoi_otrezok.aY);
	double fourth = Distance_between_2_points(this->bX, this->bY, Drugoi_otrezok.bX, Drugoi_otrezok.bY);

	double tmp1, tmp2;
	/// вспомогательные переменные для того, чтобы сохранить читаемость кода (не делать всё во вложенных if)

	/// Это - все пары расстояний между отрезками, минимальное из них - наш  ответ

	if(first < second)
	{
		tmp1 = first;
	}
	else
	{
		tmp1 = second;
	}

	if(third < fourth)
	{
		tmp2 = third;
	}
	else
	{
		tmp2 = fourth;
	}

	if(tmp1 < tmp2)
	{
		return tmp1;
	}
	else
	{
		return tmp2;
	}
}

double Distance_between_2_points(double x1, double y1, double x2, double y2)
    {
	return sqrt( (x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1) );
    }
};

int main()
{
    otrezok a = otrezok(2,-1,2,1);
    otrezok b = otrezok(0,0,3,0);
    a.Intersect(b);
    //cout << "Hello world!" << endl;
    return 0;
}