Need help with " Number guessing game " please?

Question

This is what teacher requires us to do for this assignment:
Write a program that plays a simple number guessing game. In this game the user will think of a number and the program will do the guessing. After each guess from the program, the user will either indicate that the guess is correct (by typing �c�), or that the next guess should be higher (by typing �h�), or that it should be lower (by typing �l�). Here is a sample output for a game. In this particular game the user thinks of the number 30:
$java GuessingGameProgram
Guess a number between 0 and 100
Is it 50? (h/l/c): l
Is it 25? (h/l/c): h
Is it 37? (h/l/c): l
Is it 31? (h/l/c): l
Is it 28? (h/l/c): h
Is it 29? (h/l/c): h
Is it 30? (h/l/c): c
Thank you for playing.
$
This program is implementing a binary search algorithm, dividing the range of possible values in half with each guess. You can implement any algorithm that you want, but, all things being equal, binary search is the best algorithm.
Write the program so that the functionality is split between two classes: GuessingGameProgram, and NumberGuesser.
GuessingGameProgram will only be used for its main function. It should instantiate a NumberGuesser, and it will be responsible for the loop that notifies the user of the next guess, reads the �h�, �l�, or �c� from the user, and sends an appropriate message to the number guesser accordingly.
The guesses themselves should all be generated by the NumberGuesser class. Here is a diagram of the members and methods for the class. Notice that the members are unspecified. Feel free to give your NumberGuesser class any members (which we have also been calling fields, or instance variables) that you find useful. Make them all private.
NumberGuesser
NumberGuesser(int upperLimit, int lowerLimit)
int guess()
void higher()
void lower()
The constructor should take two integer arguments, a lower and upper bound for the guesses. In your program the constructor will be called with bounds of 0 and 100.
The guess method should return the same value if it is called more than once without intervening calls to the lower or higher methods. The class should only change its guess when it receives a message indicating that its next guess should be higher or lower.
Enjoy. Focus your attention on the NumberGuesser class. It is more interesting than the GuessingGameProgram class because it is a general-purpose class, potentially useful to anybody who is writing a number guessing game. Imagine, for instance, that a few weeks from now you are asked to write a number guessing game with a graphical Java Applet front end. If you NumberGuesser class is well written, you may be able to reuse it without any modifications.
I'm new to JAVA and I'm set with my 2nd homework where I'm so confused. I know how to do something of this source in C language, but I'm a bit confused with Java. This is the code me and my classmate worked on, I know it's not 100% of what teacher asked, but is there any way possibly you guys could help me? I wrote this program if the game is played less then 10 times, thought I would then re-create a program without it, but now I'm confused, and my class book has nothing about this :( and I'm so confused and lost, can you please help? And out teacher told us that it's due the end of this week :( wish I knew what to do. Thank you so so much.
Here's the code:
import java.text.*;
import java.io.*;
class GuessingGame
public static void main( String[] args ) throws IOException
BufferedReader stdin = new BufferedReader(new InputStreamReader( System.in ) );
int guess = 0, limit = 9, x = 0, n, a = 0 ;
double val = 0 ;
String inputData;
for ( x = 1; x <= 10; x++)      //number of games played
System.out.println("round " + x + ":");
System.out.println(" ");
System.out.println("I am thinking of a number from 1 to 10. ");
System.out.println("You must guess what it is in three tries. ");
System.out.println("Enter a guess: ");
inputData = stdin.readLine();
guess = Integer.parseInt( inputData );
val = Math.random() * 10 % limit + 1;     //max limit is set to 9
NumberFormat nf = NumberFormat.getNumberInstance();
nf.setMaximumFractionDigits(0);               //format number of decimal places
String s = nf.format(val);
val = Integer.parseInt( s );
     for ( n = 1; n <= 3; n++ )      //number of guess's made
               if ( guess == val)
                    System.out.println("RIGHT!!");                    //if guess is right
                    a = a + 1;
                    System.out.println("You have won " + a + " out of " + x + " rounds");
System.out.println(" ");
n = 3;
continue;
          if (n == 3 && guess != val)                         //3 guesses and guess is wromg
                    System.out.println("wrong");
System.out.println("The correct number was " + val);
                    System.out.println("You have won " + a + " out of " + x + " rounds");
System.out.println(" ");
continue;
               //how close guess is to value
               if ( guess == val - 1 || val + 1 == guess) //Within 1
               System.out.println("hot");
     else if ( guess == val - 2 || val + 2 == guess) // Within 2
               System.out.println("warm");
          else
               System.out.println("cold");                         // Greater than 3
     inputData = stdin.readLine();
     guess = Integer.parseInt( inputData );
//ratings
if ( a <= 7)
     System.out.println("Your rating is: imbecile.");
else if ( a <= 8)
     System.out.println("Your rating is: getting better but, dumb.");
else if (a <= 9)
     System.out.println("Your rating is: high school grad.");
else if ( a == 10)
     System.out.println("Your rating is: College Grad.!!!");

Answer 1

Try this.
By saying that, I expect you ,and your classmate(s), to study this example and then write your own. Hand it in as-is and you'll be rumbled as a homework-cheat in about 20ms ;)
When you have an attempt where you can explain, without refering to notes, every single line, you've cracked it.
Also (hint) comment your version well so your tutor is left with the impression you know what you're doing.
In addition (huge hint) do not leave the static inner class 'NumberGuesser' where it is. Read your course notes and find out where distinct classes should go.
BTW - Ever wonder if course tutors scan this forum for students looking for help and/or cheating?
It's a double edged sword for you newbies. If you ask a sensible, well researched question, get helpful answers and apply them to your coursework, IMHO you should get credit for doing that.
On the other hand, if you simply post your assignment and sit there hoping some sucker like me will do it for you, you should be taken aside and given a good kicking - or whatever modern educational establishments consider appropriate abmonishment ;)
I'd say this posting is, currently, slap bang between the two extreemes, so impress us. Post your solution in the form you intend to hand it in, and have us comment on it.
Good luck!
import java.io.InputStreamReader;
import java.io.BufferedReader;
public class GuessingGame
     public static void main(String[] args)
          throws Exception
          BufferedReader reader= new BufferedReader(
               new InputStreamReader(System.in));
          NumberGuesser guesser= new NumberGuesser(0, 100);
          System.out.println(
               "\nThink of a number between 0 and 100, oh wise one...");
          int guess= 0;
          while (true) {
               guess= guesser.guess();
               System.out.print("\nIs it " +guesser.guess() +"? (h/l/c) ");
               String line= reader.readLine();
               if (line == null) {
                    System.out.println(
                         "\n\nLeaving? So soon? But we didn't finish the game!");
                    break;
               if (line.length() < 1) {
                    System.out.println("\nPress a key, you muppet!");
                    continue;
               switch (line.toLowerCase().charAt(0)) {
                    case 'h':  
                         guesser.higher();
                         break;
                    case 'l':     
                         guesser.lower();
                         break;
                    case 'c':
                         System.out.println("\nThank you for playing.");
                         System.exit(0);
                    default:
                         System.out.println(
                              "\nHow hard can it be? Just press 'h' 'l' or 'c', ok?");
                         continue;
               if (guess == guesser.guess()) {
                    System.out.println(
                         "\nIf you're going to cheat, I'm not playing!");
                    break;
     private static class NumberGuesser
          private int mLower;
          private int mUpper;
          private int mGuess;
          NumberGuesser(int lowerLimit, int upperLimit)
               mLower= lowerLimit;
               mUpper= upperLimit;
               makeGuess();
          private void makeGuess() {
               mGuess= mLower + ((mUpper - mLower) / 2);
          int guess() {
               return mGuess;
          void higher()
               mLower= mGuess;
               makeGuess();
          void lower()
               mUpper= mGuess;
               makeGuess();
}