class matrix
{
private:
     T** p = nullptr;
     size_t row;
     size_t column;
public:
    matrix(size_t row1, size_t column1, const T& value) {
        row = row1;
        column = column1;
        p = new T* [row];//  строки
        for (size_t i = 0; i < row; i++) {
            p[i] = new T [column];
        }
        for (size_t i = 0; i < row; i++) {
            for (size_t j = 0; j<column; j++) {
                p[i][j] = val(value);
            }
        }
    };


};