using namespace std;



void showMenu();
int getOption();
int getNumbers();
int addNumbers();
int divideNumbers();
int subtractNumbers();
int multiplyNumbers();
void displayResults();


void showMenu()
{
	cout << " 1. Select 1 to add two numbers." << endl;
	cout << " 2. Select 2 to divide two numbers. " << endl;
	cout << " 3. Select 3 to subtract two number. " << endl;
	cout << " 4. Select 4 to multiply two number. " << endl;
}



int getOption(int selection)
{
	cin >> selection;
	return selection;
}


void getNumbers(int& num1, int& num2)
{
	cout << "Enter two numbers: ";
	cin >> num1 >> num2;
}


int addNumbers(int num1, int num2, int& sum)
{
	sum = num1 + num2;
	return sum;
}


int divideNumbers(int num1, int num2, int& sum)
{
	sum = num1 / num2;
	return sum;
}


int subtractNumbers(int num1, int num2, int& sum)
{
	sum = num1 - num2;
	return sum;
}


int multiplyNumbers(int num1, int num2, int& sum)
{
	sum = num1 * num2;
	return sum;
}



void displayResults(int num1, int num2, int& sum)
{
	cout << num1 << " + " << num2 << " = " << sum << endl;
}



int main()
{
	int a = 0;
	int num1;
	int num2;
	int Result;

	showMenu();
	getOption(a);
	getNumbers(num1, num2);
	addNumbers(num1, num2, Result);
	divideNumbers(num1, num2, Result);
	subtractNumbers(num1, num2, Result);
	multiplyNumbers(num1, num2, Result);
	displayResults(num1, num2, Result);

	system("pause");
}