Matrix operator = (Matrix m1)
        {
            int c, l;
            c = m1.getCols();
            l = m1.getRows();
            cout << l << " " << c;
            //this->n_rows = m1.getRows();
           // cout << "yau";
            //this->n_cols = m1.getCols();
            Matrix result(l, c);

    if (this->ptr != m1.ptr)
    {
        for (int i = 0; i < l; i++)
            for (int j = 0; j < c; j++)
                {
                    result.ptr[i][j] = m1.ptr[i][j];
                    //cout << result.ptr[i][j];
                }

        for (int i = 0; i < this->n_rows; i++)
            delete (this->ptr[i]);
        delete (this->ptr);
        this->n_rows = l;
        this->n_cols = c;
        this->ptr = result.ptr;
         for (int i = 0; i < l; i++)
            for (int j = 0; j < c; j++)
                {
                    cout << this->ptr[i][j] << " ";
                }
        return *this;
    }
    else
        return m1;
        }