Question

Note: Write the pseudocode separately and the source code separately in java using the loops method according to the question. Please make sure there is no errors. Program 0 (Warm up): Gimme a cookie! In the early days of computing, you likely couldn't afford your own computer. Instead, you had to sit at a terminal - which was literally just a monochrome monitor and keyboard that was connected to a big mainframe machine (hidden somewhere in the building). When you needed a break, you were supposed to log out. Not everyone did and later fell victim to the old "Gimme a cookie" prank. While the person was away, someone else would come along and write a quick program that said "Gimme a cookie: ". When the person returned, they saw this on their terminal. After repeatedly typing in random things (like passwords), they would eventually realize they needed to type the word "cookie" to regain control of their terminal. It's quite funny, or at least it was 30 years ago. Design (pseudocode) and implement (source code) for this simple program. Sample run 1: Gimme a cookie: What? imme acookie: I don't understand www w G Gimme a imme a cookie: help? Gimme a cookie: ls -l Gimme a cookie: ^C Gimme Gimme Gimme Don't leave your terminal open, fool! cookie: Who is this? www w a cookie: ^D a cookie: ESC a cookie: cookie

Answer 1

/*
* 1) call addShutdownHook in java Runtime
* 2) create new thread object
* 3) implement run method
* 4) while input is not cookie
* 5)    catch any keyboard interruptions
* 6)    if caught create clear input buffer
* 7)    else
* 8)       ask user input
* 9) after valid input, finally print msg to user
*/
//Game.java
import java.lang.System;
import java.lang.Runtime;
import java.util.Scanner;
public class Game
{
   public static void main(String args[])
   {
       //using addShutdownHook() method we can create a thread
       // that detects any keyboard interruptions in program
       //
       Runtime.getRuntime().addShutdownHook(new Thread()
       {
           public void run()
           {
               //Scanner object for asking input
               Scanner in = new Scanner(System.in);
               String inp = "";
               //until user enters cookie
               while(true)
               {
                   //ask input to user
                   try
                   {
                       System.out.print("Gimme a cookie: ");
                       inp = in.nextLine();
                       //if cookie is the input break.
                       if(inp.equalsIgnoreCase("cookie"))
                       {
                           //finally print msg to user
                           System.out.println("Don't leave your terminal open, fool!");
                           return;
                       }
                   }
                   //catch exceptions
                   catch(Exception e)
a                   {
                       System.out.println();
                       //create new Scanner object, previous object cotains
                       //invalid buffer.
                       in = new Scanner(System.in);
                   }
               }
              
           }
       });

   }
}

C\Windows\SYSTEM32\cmd.exe Gimme Gimme a cookie: I don't Understand Gimme a cookie: Who is this? Gimme a cookie: help? Gimme Gimme a cookie: Gimme Gimme a cookie: ESC Gimme a cookie: ccookie Don't leave your terminal open, fool! Terminate batch job CY/N? cookie What? a a cookie: 1s-1 a cookie: ^D