Cash Register

[Adam Boom]

Hello everyone, new guy at java here. I have to make a cash register that prompts for prices of items, prompts for coupons, outputs number of items, number of coupons, money saved, subtotal, tax %, tax in $, and total. I also have to prompt for money received from customer, then break that money received down into $20's, $10's, $5's, $1's, $.25's, $.10's, $.05's, and $.01. I pretty much have all that done. It may not be the best program in the world, but hey, I'm new. My problem is at the very end of the program, when I have to output the CHANGE DUE to the customer. It has to be broken down like I said earlier into 20's, 10's, etc.. and only show relevant bills. So if the total is $9, customer gives $10, only $1 change should show under CHANGE DUE. Instead I'm getting all the bills with 0's next to them, and a 1 next to the actual $1.

Here is what the final output looks like for change due

------ *** CHANGE DUE *** ------
$20.00 - 0
$10.00 - 0
$5.00  - 0
$1.00  - 4
$0.25  - 2
$0.10  - 1
$0.05  - 0
$0.01  - 1

I need the ones with 0's to not showup in the console but I can't seem to figure it out. Here is my entire code

import java.util.Scanner;
import java.math.*;

public class HW01 {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
// CONSTANT VARIABLES
		double SALES_TAX = .04; // 4% tax on all items
		double VAL2000 =  20.00; // $20 value
		double VAL1000 =  10.00; // $10 value
		double VAL500  =   5.00; // $5 value
		double VAL100  =   1.00; // $1 value
		double VAL25   =   0.25; // $0.25 value
		double VAL10   =   0.10; // $0.10 value
		double VAL5    =   0.05; // $0.05 value
		double VAL1    =   0.01; // $0.01 value
		int TTAX = 4;
		
		
// DECLARED VARIABLES
		double inputval, coupon, total, taxamount, subtotal, customer, change;
		double inputval2 = 1.0, coupon2 = 1.0;
		int counter = 0;
		int coupcnt = 0;
		double num2000, num1000, num500, num100, num25, num10, num5, num1;
		
		
		System.out.print("Enter the price of your first item(0 to Quit):  ");
		inputval = input.nextDouble();
		while (inputval2 != 0)
		{ 				
			counter++;
			System.out.print("Enter the price of your next item (0 to Quit):  ");
			inputval2 = input.nextDouble();
			inputval = inputval2 + inputval; 
		}
		
		System.out.print("Enter your coupon prices if applicable(0 to Quit):  ");
		coupon = input.nextDouble();
		while (coupon2 != 0)
		{
			coupcnt++;
			System.out.print("Enter your coupon prices if applicable(0 to Quit):  ");
			coupon2 = input.nextDouble();
			coupon = coupon2 + coupon;
		}
		subtotal = inputval - coupon;
		taxamount = subtotal * SALES_TAX; 
		total = taxamount + subtotal;
		System.out.print("______________________________________________");
		System.out.printf("%nThe total number of items is:               %d%n", counter);
		System.out.printf("The total number of coupons used is:        %d%n", coupcnt);
		System.out.printf("Total amount saved from coupons:        $%.2f%n", coupon);
		System.out.printf("The subtotal is:                        $%.2f%n", subtotal);
		System.out.println("The tax percent is:                        " + TTAX + "%");
		System.out.printf("The total tax is:                       $%.2f%n", taxamount);
		System.out.printf("The total is:                          $%.2f%n", total);
		
		System.out.print("______________________________________________");
		System.out.printf("%nEnter amount received from customer:  ");
		customer = input.nextDouble();
		change = customer - total;
		
		while (customer < total)
		{
			System.out.print("\nCUSTOMER DID NOT PROVIDE ENOUGH MONEY!");
			System.out.printf("%n%nEnter amount received from customer:  ");
			customer = input.nextDouble();
			change = customer - total;
		}
		System.out.printf("$%.2f recieved from customer %n$%.2f due back to customer", customer, change);
		
				
		if (customer > total)
		{
		System.out.print("\n\n------ *** CHANGE DUE *** ------");
		num2000 = change / 20;
			if (num2000 > 0)
			{
				change = change % 20; 
				System.out.printf("%n$%.2f - %d", VAL2000, (int) num2000);
			}
		
		num1000 = change / 10;
			if (num1000 > 0)
			{
				change = change % 10;
				System.out.printf("%n$%.2f - %d", VAL1000, (int) num1000);
			}
		
		num500 = change / 5;
			if (num500 > 0)
			{
				change = change % 5;
				System.out.printf("%n$%.2f  - %d", VAL500, (int) num500);
			}
		
		num100 = change / 1;
			if (num100 > 0)
			{
				change = change % 1;
				System.out.printf("%n$%.2f  - %d", VAL100, (int) num100);
			}
		
		num25 = change / .25;
			if (num25 > 0)
			{
				change = change % .25;
				System.out.printf("%n$%.2f  - %d", VAL25, (int) num25);
			}
		
		num10 = change / .10;
			if (num10 > 0)
			{
				change = change % .10;
				System.out.printf("%n$%.2f  - %d", VAL10, (int) num10);
			}
		
		num5 = change / .05;
			if (num5 > 0)
			{
				change = change % .05;
				System.out.printf("%n$%.2f  - %d", VAL5, (int) num5);
			}
		
		num1 = change / .01;
			if (num1 > 0)
			{
				change = change % .01;
				System.out.printf("%n$%.2f  - %d", VAL1, (int) num1);
			}
		}
		
		if (customer == total)
			System.out.print("\n\nNo change necessary.");
	}

}

[Norm Radder]

Also posted at: http://www.dreamincode.net/forums/topic/397188-cash-register-problems/

[Adam Boom]

Norm Radder wrote:Also posted at: http://www.dreamincode.net/forums/topic/397188-cash-register-problems/

Ok? Thanks I guess. Not sure what that has to do with anything. Someone here might have different insight.

[Knute Snortum]

Cross posting is generally considered bad form.  It means that someone here might work on an answer when you already have a solution in the other forum.

At JavaRanch, cross-posting is allowed only if you are upfront about it.  Norm's post alerts members to the fact that you have cross-posted.

I used the link to look at the other forum post and I saw that you had a perfectly good answer there, so I didn't bother taking a hard look at your code.