/* Author: Stephanie Elzer
 * Date: March 25, 2007
 * Purpose: To demonstrate loops while playing a guessing game
 */
import java.util.*;

public class GuessGame {

	/**
	 * @param args
	 */
	// This method plays a single round of the guessing game.  If the user quits the game, a -1 is returned, otherwise
	// the number of guesses it took them to get the number is returned.
	public static int PlayGuessGame()
	{
		Random generator = new Random();
		
		// Other variable declarations
		int guess, count = 0;
		
		Scanner scan = new Scanner(System.in);

		// Generate a random number and reset count of guesses
		int randNum = generator.nextInt(100) + 1;
		count = 0;
		// Play the guessing game
		do
		{
			// Read in a guess
			System.out.print("Enter a guess (between 1 and 100, or -1 to stop):");
			guess = scan.nextInt();
			// If the user doesn't want to quit, count the number entered as a guess
			if (guess != -1)
				count++;
			// Display "too high" or "too low" as appropriate
			if ((guess < randNum) && (guess != -1))
				System.out.println("Too low!");
			else if (guess > randNum)
				System.out.println("Too high!");
			
		} while ((guess != randNum) && (guess != -1));
		
		// Print out results of the game
		if (guess != -1)
		{
			System.out.println("You got it in " + count + " tries.");
			return count;
		}
		// If the user quit, return -1 as the result
		else
		{
			System.out.println("Quitter!");
			return -1;
		}
		
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		// Set up scanner and random number generator
		Scanner scan = new Scanner(System.in);
		int count = 0, totalcount = 0;
		int games = 0;
		String another;
		
		// Allow user to play the game as many times as they would like
		do
		{
			count = PlayGuessGame();
			
			// If the user didn't quit out of the game, accumulate the statistics
			if (count!= -1)
			{
				totalcount += count;
				games++;
			}
			
			// See if the user wants to play again
			System.out.print("Do you want to play again (yes/no)? ");
			another = scan.next();
			
		} while (another.equalsIgnoreCase("yes"));
		
		// Calculate average number of guesses
		double average = 0;
		if (games >= 1)
			average = (double)totalcount / games;
		System.out.println("Average guesses: " + average);
		System.out.println("Exiting...");
		
	}

}