rr

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

class matr
{
    double** data;
public:

    matr()
    {
        data = new double*[2];
        data[0] = new double[2];
        data[1] = new double[2];

        data[0][0] = 0;
        data[0][1] = 0;
        data[1][0] = 0;
        data[1][1] = 0;
    }
    matr(const matr &temp)
    {
        data = new double*[2];
        data[0] = new double[2];
        data[1] = new double[2];

        for (int i = 0; i < 2; i++)
            for (int j = 0; j < 2; j++) data[i][j] = temp.data[i][j];
    }
    matr(const double x)
    {
        data = new double*[2];
        data[0] = new double[2];
        data[1] = new double[2];

        data[0][0] = x;
        data[0][1] = x;
        data[1][0] = x;
        data[1][1] = x;
    }
    matr(const double x1, const double x2, const double x3, const double x4)
    {
        data = new double*[2];
        data[0] = new double[2];
        data[1] = new double[2];

        data[0][0] = x1;
        data[0][1] = x2;
        data[1][0] = x3;
        data[1][1] = x4;
    }
    ~matr()
    {
        delete[] data[0];
        delete[] data[1];
        delete[] data;
    }

    matr   operator+ (const matr &temp) const
    {
        matr temp_obj(temp);

        temp_obj.data[0][0] = temp_obj.data[0][0] + data[0][0];
        temp_obj.data[0][1] = temp_obj.data[0][1] + data[0][1];
        temp_obj.data[1][0] = temp_obj.data[1][0] + data[1][0];
        temp_obj.data[1][1] = temp_obj.data[1][1] + data[1][1];

        return temp_obj;
    }
    matr   operator+ (const double &x) const
    {
        matr temp_obj(x);

        temp_obj.data[0][0] = temp_obj.data[0][0] + data[0][0];
        temp_obj.data[0][1] = temp_obj.data[0][1] + data[0][1];
        temp_obj.data[1][0] = temp_obj.data[1][0] + data[1][0];
        temp_obj.data[1][1] = temp_obj.data[1][1] + data[1][1];

        return temp_obj;
    }
    matr&  operator= (matr const& temp)
    {
        if (&temp != this)
            for (int i = 0; i < 2; i++)
                for (int j = 0; j < 2; j++) data[i][j] = temp.data[i][j];
        return *this;
    }

    matr&  operator+=(const matr &temp)
    {
        data[0][0] += temp.data[0][0];
        data[0][1] += temp.data[0][1];
        data[1][0] += temp.data[1][0];
        data[1][1] += temp.data[1][1];

        return *this;
    }
    matr&  operator+=(const double x)
    {
        data[0][0] += x;
        data[0][1] += x;
        data[1][0] += x;
        data[1][1] += x;

        return *this;
    }

    double det() const { return data[0][0] * data[1][1] - data[0][1] * data[1][0]; }
    friend ostream& operator<<(ostream &out, const matr &p)
    {
        out << setw(3) << p.data[0][0] << " " << setw(3) << p.data[0][1] << "\n" << setw(3) << p.data[1][0] << " " << setw(3) << p.data[1][1] << "\n";
        return out;
    }
    friend matr operator+ (const double &x, const matr &temp)
    {
        matr temp_obj(temp.data[0][0] + x, temp.data[0][1] + x, temp.data[1][0] + x, temp.data[1][1] + x);
        return temp_obj;
    }
};


int main()
{
    matr obj1;
    matr obj2(4);
    matr obj3(1, 2, 3, 4);
    matr obj4(obj3);

    /*
    obj1 = obj2 = obj3;
    obj1 = obj1;

    cout << obj1 << endl;
    */

    const matr obj5(5, 6, 7, 8);
    //cout << obj5.det() << endl;



    /*
    obj1 = obj5 + 1;    cout << obj1 << endl;
    obj1 = 1 + obj5;    cout << obj1 << endl;
    obj1 = obj5 + obj3; cout << obj1 << endl;
    */

    /*
    obj2 += 1;          cout << obj2;
    obj2 += obj3;       cout << obj2;
    */
}