Modify your lab from week 5 (discounts multi-way with formatted output) so that

Question

Modify your lab from week 5 (discounts multi-way with formatted output) so that the user may repeat this as many times as they wish using a sentinel value loop. Use a sentinel value loop (page 166). Use a sales amount of 0 as the sentinel value. Count the transactions, and total the amount due.

I started this but I can't figure out how to correctly use the "while"

import java.util.Scanner;
public class assignment5 {
public static void main(String [] args) {
// Create a Scanner object
Scanner input = new Scanner (System.in);

///Prompt user to enter employees name, hours worked, and hourly pay
System.out.print("Enter employee's first and last name: " );
String firstName = input.next();
String lastName = input.next();
System.out.print("Enter number of hours worked: " );
double hoursWorked = input.nextDouble();
System.out.print("Enter hourly pay rate: " );
double payRate = input.nextDouble();

// Declare variables
double regularPay;
double overtimePay;
double grossPay;
double deductions;
double netPay;
final double federalTax = (.2);
double tax;

//Determine the pay based on hours worked
if (hoursWorked <= 40) {
overtimePay = 0;
regularPay = hoursWorked * payRate;
}
else {
overtimePay = (hoursWorked - 40) * payRate * 1.5;
regularPay = 40 * payRate;
}

//Calculations of gross pay, deductions, and final amount
grossPay = (regularPay + overtimePay);
tax = federalTax * grossPay;
deductions = tax;
netPay = (grossPay - deductions);

//Outputs
System.out.println("Employees name: " + lastName + ", " + firstName );
System.out.printf("Hours worked: %2.2f " , hoursWorked );
System.out.printf("Hourly Rate: %2.2f " , payRate );
System.out.printf("Gross Pay: %2.2f " , grossPay );
System.out.printf("Regular pay: %2.2f/n " , regularPay);
System.out.printf("OvertimePay: %2.2f/n " , overtimePay);
System.out.printf("Deductions: %2.2f " );
System.out.printf("Federal Tax: %2.2f/n " , tax);
System.out.printf("TotalDeductions: %2.2f/n " , tax);
System.out.printf("Net Pay: %2.2f " , netPay );

input.close();
}
}

Explanation / Answer

// actually your program unrelated to question... because in the question sales amount is sentinal value, but in your program there is sales amount. That's why I created end of program as one sentinal value i.e., choice!='n';

import java.util.Scanner;

class assignment5 {

public static void main(String[] args) {

// Create a Scanner object

Scanner input = new Scanner(System.in);

char choice;

do{

///Prompt user to enter employees name, hours worked, and hourly pay

System.out.print("Enter employee's first and last name: ");

String firstName = input.next();

String lastName = input.next();

System.out.print("Enter number of hours worked: ");

double hoursWorked = input.nextDouble();

System.out.print("Enter hourly pay rate: ");

double payRate = input.nextDouble();

// Declare variables

double regularPay;

double overtimePay;

double grossPay;

double deductions;

double netPay;

final double federalTax = (.2);

double tax;

//Determine the pay based on hours worked

if (hoursWorked <= 40) {

overtimePay = 0;

regularPay = hoursWorked * payRate;

} else {

overtimePay = (hoursWorked - 40) * payRate * 1.5;

regularPay = 40 * payRate;

}

//Calculations of gross pay, deductions, and final amount

grossPay = (regularPay + overtimePay);

tax = federalTax * grossPay;

deductions = tax;

netPay = (grossPay - deductions);

//Outputs

System.out.println("Employees name: " + lastName + ", " + firstName);

System.out.printf("Hours worked: %2.2f ", hoursWorked);

System.out.printf("Hourly Rate: %2.2f ", payRate);

System.out.printf("Gross Pay: %2.2f ", grossPay);

System.out.printf("Regular pay: %2.2f ", regularPay);

System.out.printf("OvertimePay: %2.2f ", overtimePay);

System.out.printf("Deductions: %2.2f ", deductions);

System.out.printf("Federal Tax: %2.2f ", tax);

System.out.printf("TotalDeductions: %2.2f ", tax);

System.out.printf("Net Pay: %2.2f ", netPay);

System.out.print(" Do you want to enter again:(y/n)? ");

choice = input.next().charAt(0);

}while(choice!='n'); //choice is sentinal value

input.close();

}

}

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