#include<iostream>
using namespace std;

class calculator // Class calculator states
{
public://Public members of class calculator

	void addition();

	void subtraction();

	void multiplication();

	void division();

private:// Private members of class calculator

	double sum;

	double product;

	double sub;

	double tot;
};

int main ()
{
	calculator digits;//digits is the object given to the calculator
	char choice;

	do
	{
		cout << endl;
		cout << "Welcome to the CompE 46 Calculator, where magic happens with digits!" << endl;
		cout << "Choose A for Addition." << endl;
		cout << "Choose S for Subtraction." << endl;
		cout << "Choose M for Multiplication." << endl;
		cout << "Choose D for Division." << endl;
		cout << "Choose Q to quit this program." << endl;
		cout << "Please select an option." << endl;

		cin  >> choice;

		switch (choice)//switch member
		{
			case 'A':
			case 'a':
				digits.addition();
				break;
			case 'S':
			case 's':
				digits.subtraction();
				break;
			case 'M':
			case 'm':
				digits.multiplication();
				break;
			case 'D':
			case 'd':
				digits.division();
				break;
			case 'Q':
			case 'q':
				cout << "Have a nice day!" << endl;
				exit(1);
				break;
			default:
				cout << "Your choice was INVALID. Select one of the choices listed." << endl;
		}
	} while (choice != 4);



	return 0;
}


void calculator::addition()//Definition for addition in calculator class
{
	double a, b;

	//do
	//{
	cout << "Welcome to the ADDITION SECTION!" << endl;
	cout << "Please enter a Number and press Enter." << endl;
	cin  >>  a;

//	cout << "Invalid choice. Restarting Program. Please type a number." << endl;
	//} while (a == 0);

	cout << "Select a number you want to add to the number entered in the previous step." << endl;
	cin  >> b;
	cout << endl;
	
	sum = a + b;

	cout << a << " plus " << b << " equals " << sum << endl;
}

void calculator::subtraction()//Definition for subtraction in calculator class
{
	double c, d;

	cout << "Welcome to the SUBTRACTION SECTION!" << endl;
	cout << "Please select a number and press Enter." << endl;
	cin  >> c;
	cout << "Select a number you want to subtract to the number entered in the previous step." << endl;
	cin  >> d;
	cout << endl;

	sub = c - d;

	cout << c << " minus " << d << " equals " << sub << endl;

}

void calculator::multiplication()//Definition for multiplication in calculator class
{
	double e, f;

	cout << "Welcome to the MULTIPLICATION SECTION!" << endl;
	cout << "Please select a number and press Enter." << endl;
	cin  >> e;
	cout << "Select a number you want to multiply to the number entered in the previous step." << endl;
	cin  >> f;
	cout << endl;
	
	product = e * f;

	cout << e << " times " << f << " equals " << product << endl;

}

void calculator::division()//Definition for division in calculator class
{
	double g, h;

	cout << "Welcome to the DIVISION SECTION!" << endl;
	cout << "Please select a number and press Enter." << endl;
	cin  >> g;
	do
	{
	cout << "Select a number you want to divide to the number entered in the previous step." << endl;
	cout << "ZERO is not a valide choice." << endl;
	cin  >> h;
		if (h !=0)
		
		if (h == 0)

	}while (h == 0);
	cout << endl;

	tot = g / h;

	cout << g << " divided by " << h << " equals " << tot << endl;
}