Segment

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <cmath>
using namespace std;

/*
 *
 *    Программное обеспечение пожирает мир.
 *                                       — Марк Андрессен
 *
 */

class Segment {
private:
    double x, xx;
    double y, yy;
public:

    Segment(double x = 0, double y = 0, double xx = 0, double yy = 0) {
        this->x = x;
        this->y = y;
        this->xx = xx;
        this->yy = yy;
    };

    Segment random() {
        srand(time(0));
        return Segment(rand() % 31 - 15, rand() % 31 - 15, rand() % 31 - 15, rand() % 31 - 15);
    };

    friend ostream& operator<<(ostream& os, const Segment& at) {
        os << "x=" << at.x << ", y=" << at.y << "  ->  x1=" << at.xx << ", y1=" << at.yy;
        return os;
    };

    //Длинна отрезка
    double length() {
        return sqrt(pow(xx - x, 2) + pow(yy - y, 2));
    };

    bool equals(Segment a) {
        if (this->length() == a.length())return true;
        return false;
    };

    bool operator==(Segment a) {
        return this->equals(a);
    };

    bool operator!=(Segment a) {
        return !(this->equals(a));
    };

    void operator=(Segment b) {
        this->x = b.x;
        this->y = b.y;
        this->xx = b.xx;
        this->yy = b.yy;
    };

};