import java.util.Scanner;

/* Java program to compute an employee's gross and net pay for a week.
** A fixed percentage of gross pay is deducted for taxes.
** There is no consideration given to overtime pay.
** Input is provided via the keyboard (as opposed to being hard-coded,
** as it was in the previous versions of this program).
**
** As in the previous version of this program, here we use separate
** methods for computing gross pay, tax, and net pay.  Each of these
** methods assigns the computed value to a global variable.  This is not
** the preferred way of doing things, but we resort to it because, at
** this point in the course, we have neither parameter passing nor
** functional methods at our disposal.
**
** Author: R. McCloskey
** Date: Sept. 2016 (modified Sept. 2023)
*/

public class GrossNetPay2 {

   static final double TAX_RATE = 0.1825;  // symbolic constant

   static double hoursWorked, hourlyWage;  // inputs
   static double grossPay, netPay;         // outputs
   static double tax;                      // auxiliary variable

   public static void main(String[] args) {

      // Create a Scanner object that can read input from the keyboard.
      Scanner keyboard = new Scanner(System.in);

      // For each input value, prompt user and read response
      System.out.print("Enter employee's hours worked:");
      hoursWorked = keyboard.nextDouble();

      System.out.print("Enter employee's hourly wage:");
      hourlyWage = keyboard.nextDouble();

      computeGrossPay();
      computeTax();
      computeNetPay();
      reportResults();
   }


   /* Computes gross pay and assigns the result to the proper global variable.
   ** Assumes ability to access global variables containing values for hours
   ** worked and hourly wage.
   */
   private static void computeGrossPay() {
      grossPay = hoursWorked * hourlyWage;
   }

   /* Computes tax and assigns the result to the proper global variable.
   ** Assumes ability to access global variables containing values for gross
   ** pay and tax rate.
   */
   private static void computeTax() {
      tax = grossPay * TAX_RATE;
   }

   /* Computes net pay and assigns the result to the proper global variable.
   ** Assumes ability to access global variables containing values for gross
   ** pay and tax.
   */
   private static void computeNetPay() {
      netPay = grossPay - tax;
   }

   /* Prints a message reporting the employee's hours worked, hourly wage,
   ** gross pay, and net pay.  Assumes ability to access global variables
   ** containing the values of these quantities.
   */
   private static void reportResults() {
      System.out.println(hoursWorked + " hours worked at $" +
                         hourlyWage + " per hour");
      System.out.println("yields gross pay of $" + grossPay +
                         "\nand net pay of $" + netPay);
   }

}