Help with Guessing Game

[Stealther]

Hey there....I have a simple problem...well I think it might be a logical error but I don't know...I made a simple number guessing game in Java the other day but I want to improve it a little more...I want the person to be able to play the game again without having to compile the and run the program again!

Anyway...here is my simple code:

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

public class Guessing {

	public static void main(String[] args) 
	{
		final int MAX = 10;
		int guess, answer;
		String another = "y";
		Scanner scan = new Scanner(System.in);
		
		
		Random generator = new Random();
		answer = generator.nextInt(MAX) + 1;
		
		System.out.print
			(
				"I'm thinking of a number between 1 and " + MAX +
				". Guess what it is: "
			);
		guess = scan.nextInt();
		
		while(another.equalsIgnoreCase("y"))
		{

			if (guess == answer){
		
				System.out.println
					(
					"You got it correct! Good guessing!"
					);
		
			}else{
		
			System.out.println
					(
						"Sorry, but that is incorrect."
					);
				System.out.println
					(
						"The correct number was " + answer +
						"."
					);
			}
		
			System.out.println();
			System.out.print
				(
					"Play Again?(Y/N)"
				);
			another = scan.nextLine();
		}
	}
}

See...the code prints out Play Again?(Y/N) but it doesn't allow input for some reason...!

[Stealther]

Oh hey sorry for double posting but I left out some info...! All the semicolons are there...the braces are all balanced and so are the parentheses so this can't be a syntax error.

[ddreier]

You probably need to move the 'game part' of the program into a separate function or method (or whatever Java calls it). Then you can use a do-while loop (or plain while loop) to check the input and re-start the game part as per the user's response.

Pseudo Code:

string input = <however you get the input>;

while(input == "y")
{
    playGame();
}

[Stealther]

For some reason that doesn't work. Anyway I will set that aside for some time now. What I do want is to make a while loop so if an invalid input is put (such as -222) the game will output "Please enter a valid number: ". See I have the while loop but it doesn't work for some reason.

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

public class Guessing 
{
	public static void main(String[] args) 
	{
		final int MAX = 10;
		int guess, answer;
		String another = "y";
		Scanner scan = new Scanner(System.in);
		
		
		Random generator = new Random();
		answer = generator.nextInt(MAX) + 1;
		
		System.out.print
			(
				"I'm thinking of a number between 1 and " + MAX +
				". Guess what it is: "
			);
		guess = scan.nextInt();
		
		while(answer < 1 || answer > MAX)
		{
			System.out.print
				(
					"Please enter a valid number: "
				);
                        answer = scan.nextInt();
		}
		
		if (guess == answer)
		{
			System.out.println
				(
				"You got it correct! Good guessing!"
				);
		
		}else{
		
		System.out.println
				(
					"Sorry, but that is incorrect."
				);
			System.out.println
				(
					"The correct number was " + answer +
					"."
				);
		}
	}
}

[callumjones]

I think you are mixing up your answer and guess variables

while(answer < 1 || answer > MAX)
		{
			System.out.print
				(
					"Please enter a valid number: "
				);
                        answer = scan.nextInt();
		}

should be

while(guess < 1 || guess > MAX)
		{
			System.out.print
				(
					"Please enter a valid number: "
				);
                        guess = scan.nextInt();
		}

[Stealther]

oh wow what a humiliating mistake that was!!!! But for some reason when I enter a number like 90 or 555 it still doesn't allow for input. I'm wondering why. Thanks anyway I'll try to ask my teacher on another school day.

[Stealther]

Oh hey just to let you guys know I got it fixed. The whole code is correct but it seems that I had to make a new Scanner and I did and it works extremely great! Thanks for your help the only thing with your is that I was not at your level with making my own classes and things like that but I will learn soon! :) Thanks for your help anyway! :)