Матричный калькулятор / class

#include "lib.h"
void Matrix::Create()
{
	Matr = new long int*[p];
	for (int i = 0; i < p; i++)
	{
		Matr[i] = new long int[p];
		for (int j = 0; j < p; j++)
			Matr[i][j] = 0;
	}
}
Matrix::Matrix()
{
	p = n;
	Create();
}
Matrix::~Matrix()
{
	for (int i = 0; i < p; i++)
		delete [] Matr[i];
	delete [] Matr;
}
void Matrix::Sum(Matrix *A, Matrix *B)
{
	for (int i = 0; i < p; i++)
		for (int j = 0; j < p; j++)
			Matr[i][j] = A->Matr[i][j] + B->Matr[i][j];
}
void Matrix::Mult(Matrix *A,Matrix *B)
{
	for (int i = 0; i < p; i++)
		for (int j = 0; j < p; j++)
			for (int k = 0; k < p; k++)
				Matr[i][j] += A->Matr[i][k] * B->Matr[k][j];
}
void Matrix::Reset()
{
	for (int i = 0; i < p; i++)
		for (int j = 0; j < p; j++)
			Matr[i][j] = 0;
}
void Matrix::Print()
{
	for (int i = 0; i < p; i++)
	{
		for (int j = 0; j < p; j++)
			cout << Matr[i][j] << " ";
		cout << endl;
	}
}
void Matrix::Push()
{
	cout << "Заполните матрицу:\n";
	for (int i = 0; i < p; i++)
		for (int j = 0; j < p; j++)
			cin >> Matr[i][j];
	cout << endl;
}
int menu()
{
	int point;
	cout << "____Меню____\n"
		<< "1. Сумма матриц\n"
		<< "2. Произведение матриц\n"
		<< "0. Выход из программы\n\n"
		<< ">>  ";
	cin >> point;
	return point;
}
void PrintMatrix(Matrix*A, Matrix*B, Matrix*R)
{
	R->Reset();
	cout << "\nПервая матрица:\n";
	A->Print();
	cout << "\nВторая матрица:\n";
	B->Print();
	cout << "\nРезультат:\n";
}