sads

class Matrix
{
    int m, n;
    int **p;
public:
    Matrix(int n=0,int  m=0)
    {
        this->n = n;
        this->m = m;
        p = new int*[n];
        for (int i = 0; i < n;i++)
        {
            p[i] = new int[m];
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                p[i][j] = rand() % 10;
            }
        }
    }
    Matrix(Matrix &Obj)
    {
        this->n = Obj.n;
        this->m = Obj.m;

        if (p)
        {
            for (int i = 0; i < n; i++)
            {
                delete[]p[i];
            }
            delete[] p;
        }
        p = new int*[n];
        for (int i = 0; i < n; i++)
        {
            p[i] = new int[m];
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                p[i][j] = Obj.p[i][j];
            }
        }
    }
    ~Matrix()
    {
        for (int i = 0; i < n; i++)
        {
            delete[]p[i];
        }
        delete[] p;
    }
    void Show()
    {
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                cout.width(4);
                cout << p[i][j];
            }
            cout << endl;
        }
        cout << endl;
    }
    void Change(int index1, int index2, int value)
    {
        p[index1][index2] = value;
    }
};




int _tmain(int argc, _TCHAR* argv[])
{
    srand(GetTickCount());
    Matrix mas1(3, 4), mas2(5, 5), mas3(mas1);
    mas1.Show();
    mas2.Show();
    mas3.Show();
    mas3.Change(2, 2, 100);
    mas3.Show();

    _getch();
    return 0;
}