BCS 120 - Assignment 3

//Assignment 3
int addNumbers(int x, int y)
{
	return x + y;
}

//Assignment 3
int subtractNumbers(int x, int y)
{
	return x - y;
}

//Assignment 3
int multiplyNumbers(int x, int y)
{
	return x * y;
}

//Assignment 3
int divideNumbers(int x, int y)
{
	return x / y;
}

//Assignment 3
void calculator(string operation)
{
	system("cls");
	int x,
		y,
		result;

	cout << "Enter the first number:";
	cin >> x;

	cout << "Enter the second number:";
	cin >> y;

	if (operation == "+")
	{
		result = addNumbers(x, y);
	}
	else if (operation == "-")
	{
		result = subtractNumbers(x, y);
	}
	else if (operation == "x")
	{
		result = multiplyNumbers(x, y);
	}
	else if (operation == "/")
	{
		result = divideNumbers(x, y);
	}

	cout << x << operation << y << "=" << result << endl;
	system("pause");
}

//Assignment 3
void showMenu()
{

	char selection;
	system("cls");

	do
	{
		cout << " Calculator Menu\n";
		cout << " ====================================\n";
		cout << " 1. Add\n";
		cout << " 2. Subtract\n";
		cout << " 3. Multiple\n";
		cout << " 4. Divide";
		cout << "\n";
		cout << " X. Exit\n";
		cout << " ====================================\n";
		cout << " Enter your selection: ";
		cin >> selection;
		cout << endl;

		switch (selection)
		{
		case '1':
			calculator("+");
			system("cls");
			break;
		case '2':
			calculator("-");
			system("cls");
			break;
		case '3':
			calculator("x");
			system("cls");
			break;
		case '4':
			calculator("/");
			system("cls");
			break;

		case 'x':
		case 'X':
			_getch();
			return;
		default: cout << selection << " is not a valid menu item.\n";

			cout << endl;
		}
	} while (selection != 'x' || selection != 'X');
}

//Assignment 3
void assignment3()
{
	showMenu();
}