// A painting company has determined that for every 115 sqft
// of wall space one gal of paint and eight hours of labor will be required.
// The company charges 18.00 per hour for labor.
#include <iostream>
#include <iomanip>
using namespace std;

// Prototype function
int paintPerGallon();
void roomPolicy();
void validateRooms();

// Global constant
const double COMPANY_CHARGES = 18.00;


// Main
int main()
{
	int numOfrooms;
	double totalSquareFeet = 0;	// accumulator for running total
	double numOfGallons, hoursOfLabor;
	double costOfPaint, totalLabor;


	// Call function room policy for the user
	roomPolicy();

	// Ask user to enter number of rooms to be painted
	cout << "Enter the number of rooms to be painted.\n";
	cin >> numOfrooms;

	// Call function validate rooms for user.
	validateRooms();
	for (int loop = 1; loop <= numOfrooms; loop++)
	{
		int rooms;
		cout << "Enter the square feet for room " << loop << ":" << endl;
		cin >> rooms;
		totalSquareFeet += rooms;
	}

	// Format output
	cout << fixed << showpoint << setprecision(2);

	cout << "Total square feet is " << totalSquareFeet << "." << endl;

	paintPerGallon();

	numOfGallons = totalSquareFeet / 415;

	// Calculate hours of labor
	hoursOfLabor = numOfGallons * 8;

	// Calculate cost of paint
	costOfPaint = paintPerGallon * numOfGallons;

	// Calculate total labor
	totalLabor = hoursOfLabor * COMPANY_CHARGES;

	// Let the user know all totals from the paint job
	cout << "Total number of gallons used are " << numOfGallons << "." << endl;
	cout << "Total hours of labor are " << hoursOfLabor << "." << endl;
	cout << "The total cost of the paint is " << costOfPaint << "." << endl;
	cout << "Total labor charges will be " << totalLabor << "." << endl;
	return 0;
}

int paintPerGallon()
{
	int paintPerGallon;
	cout << "How much is the paint per gallon?\n";
	cin >> paintPerGallon;
	if (paintPerGallon >= 10)
		return paintPerGallon;
	else
		cout << "That is too cheap for a gallon of paint! Please enter a valid price." << endl;
}

void roomPolicy()
{
	cout << "Please be advised that we have a one room \n";
	cout << "minimum and a fifty room maximum rooms to be painted.\n";
}

void validateRooms()
{
	int numOfrooms;
	while (numOfrooms < 1 || numOfrooms > 50)
	{
		cout << "Please see our room limit policy!\n";
		cin >> numOfrooms;
	}
}