P. 85 Ex. 5

// Shavit Borisov
// CW

import java.util.Random;
import java.util.Scanner;

public class GuessGame {

    public static void main(String[] args)

    {
        String prize = "1 million dollars";
        Scanner in = new Scanner(System.in);
        Random rnd = new Random();

        guessForm player = new guessForm(prize);
        guessForm computer = new guessForm(prize);

        while((player.isWin() == false) && computer.isWin() == false)
        {
            System.out.print("Your guess: ");
            int guess = in.nextInt();
            if(player.isGoodGuess(guess))
                System.out.println("Good guess");
            else
                System.out.println("Bad guess");

            int r = rnd.nextInt(20) + 1;

            System.out.println("Computer's guess: " + r);

            if(computer.isGoodGuess(r))
                System.out.println("Good guess");
            else
                System.out.println("Bad guess");
        }
        if(player.isWin() && computer.isWin())
            System.out.println("You and the computer both win: " + player.getPrize());
        else if(player.isWin())
            System.out.println("You won: " + player.getPrize());
        else if(computer.isWin())
            System.out.println("The computer won: " + computer.getPrize());
        else
            System.out.println("You and the computer both lose: " + player.getPrize());
        in.close();
    }
}

// Next class

import java.util.Random;

public class guessForm
{
    private String prize;
    private int[] numbers;
    private boolean[] guessedNumbers;

    private final int SIZE = 5;

    public guessForm(String prize)
    {
        this.prize = prize;
        numbers = new int[SIZE];
        guessedNumbers = new boolean[SIZE];
        Random rnd = new Random();
        boolean[] nums = new boolean[21];
        for(int i = 0; i <= 20; i++)
            nums[i] = false;
        int r;
        for(int i = 0; i < SIZE; i++)
        {
            r = rnd.nextInt(20) + 1;
            while(nums[r] == true)
                r = rnd.nextInt(20) + 1;
            nums[r] = true;
            numbers[i] = r;
            guessedNumbers[i] = false;
        }
    }

    public String getPrize()
    {
        return prize;
    }

    public boolean isWin()
    {
        for(int i = 0; i < SIZE; i++)
            if(guessedNumbers[i] == false)
                return false;
        return true;
    }

    public boolean isGoodGuess(int guess)
    {
        for(int i = 0; i < SIZE; i++)
        {
            if(numbers[i] == guess)
            {
                if(!guessedNumbers[i])
                {
                    guessedNumbers[i] = true;
                    return true;
                }
                else
                    return false;
            }
        }
        return false;
    }
}