// 11/08/2017

/** The Payroll class calculates the Net Pay for several
 *  employees. This is version 6c of the Payroll class which modifies
 *  version 5c.
 *  This version uses ARRAYS.
 * The latest time we modified this pgm is 11/27/2017 where we 
 * illustrated PARTIALLY FILLED ARRAYS.
 *  */

import java.util.Scanner;

public class Payroll6c {
  /**
   * pay is calculated by multiplying hours by rate.
   */
  public static void main(String[] args)   {
    
       // declare arrays for each piece of information necessary
       // to store about an employee.
       // these are parallel arrays, each location [numEmps] represents
       // info about employee i.
       final int MAXSIZE = 250;
       final double TAXES = .017;
       double[] rate = new double[MAXSIZE];
       double[] pay = new double[MAXSIZE]; 
       int[]  hoursWorked = new int[MAXSIZE];
       String[] name = new String[MAXSIZE];  
       Scanner readObject = new Scanner(System.in);
       double totalPay=0;
       double[] taxes = new double[MAXSIZE];
       
       int[] idnum = new int[MAXSIZE];
       System.out.print("Enter idnum (-1 to exit): ");
       int numEmps=0; // this keeps track of index into arrays
       // and the number of employees read in
       idnum[numEmps] = readObject.nextInt();
      
      // Structured Read Loop
       while (idnum[numEmps] !=-1) {
         readObject.nextLine(); // to skip newline in input buffer
         // prompt the user to enter a name
         System.out.print("Enter a name of employee: ");
         name[numEmps] = readObject.nextLine();
         // prompt the user to enter data for hours and rate
         System.out.print("Enter number of hours worked and rate of pay: ");     
         hoursWorked[numEmps] = readObject.nextInt();
         rate[numEmps] = readObject.nextDouble();
         pay[numEmps] = rate[numEmps] * hoursWorked[numEmps];
         taxes[numEmps] = TAXES*pay[numEmps];
         pay[numEmps]-=taxes[numEmps];
         totalPay+=pay[numEmps]; // add this employee's pay to the total
        
         numEmps++;
         readObject.nextLine(); // to skip newline in input buffer
         // end of loop read for Structured Read Loop
         System.out.print("Enter idnum (-1 to exit): ");
         idnum[numEmps] = readObject.nextInt();
         }
       System.out.println("You entered " + numEmps + " employees." +
                       "\nTotal Pay is: " + totalPay);
       
       // use loop to print all data
       System.out.println("ID     Name   Hours   Rate     Pay");
       System.out.println("----------------------------------");
       for (int i=0; i<numEmps;i++)
            System.out.printf("%d %8s  %4d $%4.2f $%,8.2f\n",
                              idnum[i], name[i], hoursWorked[i], 
                              rate[i], pay[i]);
       
  }
}