/* Name: Mahmoud Elsaftawy
   Date: March 31, 2008
   Teacher: Mr. Sayed
   Class: ICS3M0
   This program gets the previous and present readings
   of water entered by the user and calculates the amount
   of water used in the previous month
*/
// The "MElsaftawy_ICS3M_2_2_5" class.
import java.awt.*;
import hsa.Console;

public class MElsaftawy_ICS3M_2_2_5
{
    static Console c;           // The output console

    public static void main (String[] args)
    {
        c = new Console ();

        //Declare variables for the previous and present reading of water
        int previousRead, presentRead;

        //Idiot Proof Loop
        //Ask for the previous reading of water
        do
        {
            c.print ("Enter the previous reading of water in 5 digits: ");
            previousRead = c.readInt (); // get the user input
        }
        while (previousRead < 0 || previousRead > 99999);

        //Ask for the Present reading of water
        do
        {
            c.print ("\nEnter the present reading of water in 5 digits: ");
            presentRead = c.readInt (); // get the user input
        }
        while (presentRead < 0 || presentRead > 99999);


        if (previousRead < presentRead)
        {
            c.println ("\nThe amount used in the present month is " + (presentRead - previousRead));
        }
        else
        {
            c.println ("\nThe amount used in the previous month is " + (previousRead - presentRead));
        }
    } // main method
} // MElsaftawy_ICS3M_2_2_5 class