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#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
#include <clocale>
#include <curses.h>
#include <cstdlib>
#include <cstdio>

using namespace std;
class dpoint
{
  private:
    double *px;
    double *py;

  public:
    dpoint() // конструктор без параметров
    {
        px = new double(0);
        py = new double(0);
    }
    ~dpoint()
    {
        if (px != NULL)
            delete px;
        if (py != NULL)
            delete py;
    }
    dpoint(dpoint &z) //конструктор копирования
    {
        px = new double(*z.px);
        py = new double(*z.py);
    }
    dpoint(double x0, double y0) //конструктор с параметрами
    {
        px = new double(x0);
        py = new double(y0);
    }
    void input();
    void output();
    friend istream &operator>>(istream &in, dpoint &z);
    dpoint &operator=(dpoint &z) //перегрузка присваивания
    {
        if (this == &z)
            return z;
        *px = *z.px;
        *py = *z.py;
        return *this;
    }
};

void dpoint::input()
{
    cout << "x = ";
    cin >> *px;
    cout << "y = ";
    cin >> *py;
}
istream &operator>>(istream &in, dpoint &z)
{
    cout << "x = ";
    in >> *z.px;
    cout << "y = ";
    in >> *z.py;
    return in;
}
void dpoint::output()
{
    cout << "x = " << *px << endl;
    cout << "y = " << *py << endl;
}

class treug : public dpoint
{
  private:
    dpoint *pa;
    dpoint *pb;
    dpoint c;

  public:
    treug()
    {
        pa = new dpoint(0, 0);
        pb = new dpoint(0, 0);
    }
    treug(double x1, double y1, double x2, double y2, double x3, double y3) : c(x3, y3)
    {
        pa = new dpoint(x1, y1);
        pb = new dpoint(x2, y2);
    }
    ~treug()
    {
        if (pa != NULL) delete pa;
        if (pb != NULL) delete pb;
    }
    treug(treug &z)
    {
        pa = new dpoint(*z.pa);
        pb = new dpoint(*z.pb);
        c = z.c;
    }
    treug& operator=(treug &z)
    {
        if (this == &z) return z;
        *pa = *z.pa;
        *pb = *z.pb;
        c = z.c;
    }
    void output()
    {
        pa->output();
        pb->output();
        c.output();
    }
    friend void nev();
};