ds

    Matrix(const Matrix<T> & matrix) {
        rows = matrix.GetRows();
        columns = matrix.GetColumns();
        data = new T *[rows];
        for (size_t i = 0; i != rows; i++)
            data[i] = new T[columns];
        for (size_t i = 0; i != rows; i++) {
            for (size_t j = 0; j != columns; j++) {
                data[i][j] = matrix[i][j];
            }
        }
    }

    Matrix operator =(const Matrix<T> & matrix) {
        for (size_t i = 0; i != rows; i++) {
            delete[] data[i];
        }
        delete[] data;
        rows = matrix.GetRows();
        columns = matrix.GetColumns();
        data = new T *[rows];
        for (size_t i = 0; i != rows; i++)
            data[i] = new T[columns];
        for (size_t i = 0; i != rows; i++) {
            for (size_t j = 0; j != columns; j++) {
                data[i][j] = matrix[i][j];
            }
        }
        return data;
    }