Open the project named ch02_ex3_Invoice that’s in the ex_starts directory.
Then, open the file named InvoiceApp.java
Modify the code so the application ends only when the user enters “n” or ‘N”.
As it is now, the application ends when the user enters anything other than “y”
or “Y”. To do this, you need to use a not operator (!) with the equalsIgnoreCase method.
This is illustrated by the third example in figure 2-14. Then, compile this class and test this change by entering 0 at the Continue prompt.
Modify the code so it provides a discount of 25 percent when the subtotal is greater than or equal to 500. Then, test this change.
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();
}
}
}
Choose an academic level, add pages, and the paper type you want.
To reduce the cost of our essay writing services, select the lengthier deadline.
We can't believe we just said that to you.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more
Recent Comments