//********************************************************************

// PP408.java picks a random number between 1 and 100 (inclusive),

// then repeatedly prompts the user to guess the number

// NEEDS MORE WORK TO RESET VALUES WHEN PLAYED AGAIN.

//********************************************************************

import java.util.Scanner;

import java.util.Random;

public class PP408

{

static int guess = -1;

public static void main(String[] args)

{

int rand, guessCount = 0;

Scanner scan = new Scanner(System.in);

Random generator = new Random();

rand = generator.nextInt(100) + 1;

System.out.println("Guess the random number between 1 and 100. 0 to quit.");

while (guess != 0 && rand != guess)

{

System.out.print("Guess: ");

while (!scan.hasNextInt())

{

scan.next();

System.out.println("Guess must be a valid integer.");

System.out.print("Guess: ");

}

guess = scan.nextInt();

if (guess == 0)

{

System.out.println("You quit after " + guessCount + " valid guesses.");

playAgain();

continue;

}

else if ((guess < 0 || guess> 100))

{

System.out.println("Guess must be between 1 and 100.");

continue;

}

guessCount++;

if (guess < rand)

{

System.out.println("Guess is low.");

continue;

}

else if (guess > rand)

{

System.out.println("Guess is high.");

continue;

}

else

{

System.out.println("Correct. You took " + guessCount + " guesses.");

playAgain();

}

}

}

public static void playAgain()

{

Scanner scan = new Scanner(System.in);

System.out.print("Play again (y/n)?");

String play = scan.next();

if (play.toLowerCase().charAt(0) == 'y')

guess = -1;

System.out.println("Guess the random number between 1 and 100. 0 to quit.");

}

}