Reference no: EM13763509

Modify the code so it displays the number of invoices, the average invoice amount, and the average discount amount when the user ends the program. Then, test this change.

import java.util.Scanner;

public class InvoiceApp

{

public static void main(String[] args)

{

// welcome the user to the program

System.out.println("Welcome to the Invoice Total Calculator");

System.out.println(); // print a blank line

// create a Scanner object named sc

Scanner sc = new Scanner(System.in);

// perform invoice calculations until choice isn't equal to "y" or "Y"

String choice = "y";

while (choice.equalsIgnoreCase("y"))

{

// get the invoice subtotal from the user

System.out.print("Enter subtotal: ");

double subtotal = sc.nextDouble();

// calculate the discount amount and total

double discountPercent= 0.0;

if (subtotal >= 200)

discountPercent = .2;

else if (subtotal >= 100)

discountPercent = .1;

else

discountPercent = 0.0;

double discountAmount = subtotal * discountPercent;

double total = subtotal - discountAmount;

// display the discount amount and total

String message = "Discount percent: " + discountPercent + "n"

+ "Discount amount: " + discountAmount + "n"

+ "Invoice total: " + total + "n";

System.out.println(message);

// see if the user wants to continue

System.out.print("Continue? (y/n): ");

choice = sc.next();

System.out.println();

}

}

}