main:
	m1 = [][]
	m2 = [][]
	int choice = 0;
	getMatricies(m1, m2);
	menu(choice, m1, m2);

menu(choice, m1, m2)
	while choice != 4
		choice = readInt(menu, error message)

		switch 
			1:
				getMatrices(m1, m2)
			2:
				multiply(m1, m2)
			3:
				add(m1, m2)
			4: 
				outout exit message
			defualt:
				error try again

getMatricies(&m1, &m2)
	getMatrix(m1)
	getMatrix(m2)


getMatrix(&m)
	for (x 0-2)
		for (y 0-2)
			m[x][y] = readfloat(input value for x, y; error message)

readInt(question, error)
	int value
	ouptut question
	read input to value
	while cin error
		ouptut error
		output question
		read input -> value
	return value

readFloat(question, error)
	float value
	ouptut question
	read input to value
	while cin error
		ouptut error
		output question
		read input -> value
	return value

printMatrix(m)
	for (x 0-2)
		for (y 0-2)
			output m[x][y]
		newline

add(m1, m2)
	result = [][]
	for x 0-2
		for y 0-2
			result[x][y] = m1[x][y] + m2[x][y]

	printMatrix(result)

multiply(m1, m2)
	result = [][]
	for x 0-2
		for y 0-2
			result[x][y] = dotproduct(x, y, m1, m2)

	printMatrix(result)

dotproduct(x, y, m1, m2)
	product = 0
	for i 0-2
		product += m1[x][i] * m2[i][y]
	return product