/*Date: 02/11/08
Programming Fundamentals II
Homework Assignment Chapter 4-Question #4.10
Bank Charges - A bank charges $10 per month plus the following check fees for a 
commercial checking account:
$.10 each for fewer than 20 checks
$.08 each for 20-39 checks
$.06 each for 40-59 checks
$.04 each for 60 or more checks
Write a program that asks for the number of checks written during the past month,
then computes and displays the bank's fees for the month.
	Input Validation: Do not accept a negative value for the number of checks written.
*/
#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	//create double variables to hold input and fees
	double checks =0,
		   totalfee =0,
		   fee = 10,
		   fee1 =.1,
		   fee2 = .08,
		   fee3 = .06,
		   fee4 = .04,
		   first =0,
		   second =0,
		   third =0,
		   fourth =0;
	//create bool variable for ending of program
	bool closing = true;

	//Welcome user and introduce program, then ask for input from user
	cout << "Welcome to Hector's Monthly Check Fees Calculator, Build 1.0\n";
	cout << "Please enter the number of checks you wrote for the past month.\n";
	cin >> checks;

	//if user inputs negative number, gives user following message and sets closing to false
	if (checks < 0)
	{
		cout << "ERROR: You cannot enter a negative amount of checks!\n";
		closing = false;
	}

	//takes input from user and figures monthly bank fees
	if(checks <20)
		first = (checks * fee1);
	if(checks >= 20 && checks <= 39)
		second = (19*fee1) + ((checks-19) * fee2);
	if(checks >= 40 && checks <= 59)
		third = (19*fee1) + (20 * fee2)+((checks-39) * fee3);
	if(checks >= 60)
		fourth =(19*fee1) + (20 * fee2)+(20 * fee3)+((checks-59) * fee4);
	
	//adds all fees together
	totalfee = (fee+first+second+third+fourth);

	//if closing true(because user didn't enter negative number, show total fees
	if (closing)
		cout <<"Your total monthly Bank Fees are $" << fixed << setprecision(2) << totalfee <<".\n";

	//thank user for using program
	cout <<"Thank You for using my program.\n";

	return 0;
}