//Programming Fundamentals ONLINE
//Chapter 6 Programming Challenges #13- Order Status
//Create program with two functions
//First function takes input from user and stores in reference parameters
//Second function uses arguments to display totals
//validate: no less than 1 for spools ordered & no less than 0 spools in stock
//and no less than 0 for shipping and handling
#include <iostream>
#include <iomanip>
using namespace std;

void getSpoolInv(double&, double&, double&);
double spoolOrdered, spoolStock, addlCharges;
void displayTotals();

int main()
{
	cout << endl;
	cout <<"+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n";
	cout <<"++++++++++++++Welcome to My Spool Order Status Program.++++++++++++++\n";
	cout <<"+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n";
	cout <<"This program will calculate total inventory and total charges.\n";
	getSpoolInv(spoolOrdered, spoolStock, addlCharges);
	displayTotals();
	return 0;
}
//***********************************************************************
//definition of getSpoolsInv
//will store spool inventory and charges in spoolOrdered, spoolStock, addlCharges
//validates: no less than 1 for spools ordered & no less than 0 spools in stock
//and no less than 0 for shipping and handling
//***********************************************************************
void getSpoolInv(double &spoolOrdered, double &spoolStock, double &addlCharges)
{
	cout <<"---------------------------------------------------------------------\n";
	cout << "Please enter number of spools ordered (cannot be less than 1): ";
	cin  >> spoolOrdered;
		while (spoolOrdered <1)
		{
			cout <<"Number cannot be less than 1, enter again: ";
			cin  >> spoolOrdered;
		}
	cout << "Please enter number of spools in stock (cannot be less than 0): ";
	cin  >> spoolStock;
		while (spoolStock <0)
		{
			cout <<"Number cannot be less than 0, try again: ";
			cin  >> spoolStock;
		}
	cout <<"---------------------------------------------------------------------\n";
	cout << "Every shipment is subject to $10.00 shipping and handling charges.\n";
	cout << "Enter extra shipping & handling charges (cannot be less than $0): $";
	cin  >> addlCharges;
		while (addlCharges <0)
		{
			cout <<"Cannot be less then $0, enter again: $";
			cin  >> addlCharges;
		}
}
//***********************************************************************
//definition of displayTotals
//figures totals for program and displays all totals
//***********************************************************************
void displayTotals()
{
	double shipTotal, backOrder, totalSelling, totalSH, readyShip;
	
	if (spoolStock>spoolOrdered)
	{
		readyShip=spoolOrdered;
		cout <<"---------------------------------------------------------------------\n";
		cout <<"Spools Ready To Ship: " << readyShip << endl;
	}
	else
	{
		backOrder=spoolOrdered-spoolStock;
		cout <<"---------------------------------------------------------------------\n";
		cout <<"Not enough spools in Stock to complete order.\n";
		cout <<"Spools Ready to Ship: " << spoolStock << endl;
		cout <<"Spools on Back Order: " << backOrder << endl;
		readyShip=spoolStock;
	}

	totalSelling = readyShip * 100;
	totalSH = readyShip *(10+addlCharges);

	cout <<"---------------------------------------------------------------------\n";
	cout <<"Total Selling Price of Spools Ready To Ship: $" << fixed << setprecision(2) << totalSelling << endl;
	cout <<"Total Shipping & Handling of Spools Ready To Ship: $" << fixed << setprecision(2) << totalSH << endl;
	cout <<"Total Order Ready To Ship: $" << fixed << setprecision(2) << totalSelling + totalSH << endl;
	cout <<"---------------------------------------------------------------------\n";
}