Guessing a number help.

[KoreyAusTex]

I have written a program using method calls as opposed to nested while loops, or rather a while within a while, but for some reason the only way I can get the program to terminate is to type break in the main method after the method calls. This is not the way I was supposed to do it, any thoughts?

import java.util.*;
public class GuessNumber 
{
    public static void main(String[] args) 
    {
       Scanner read = new Scanner(System.in);
       System.out.print("Do you want to play a game? ");//War Games!
       String collegeTry = read.next();
       collegeTry = collegeTry.toLowerCase();
       while (((collegeTry.equals("yeah")) || (collegeTry.equals("sure")) || (collegeTry.equals("ok"))))
       {
           game();
           break;
       }
    }
 
    public static void game() 
    {
        Scanner read = new Scanner(System.in);
        Random generator = new Random();
        int randNum = generator.nextInt(100) + 1; // pick a number between 1 & 100
        System.out.println("\nWelcome to the High-Low Guessing Game!");
        System.out.println("Try to guess the number I've chosen between 1 and 100.");
        System.out.print("\nWhat is your guess? ");
        int guessNum = read.nextInt();
        int count = 1;
 
        while (guessNum != randNum) 
        {
            if (guessNum > randNum)
            {
                System.out.println(guessNum + " is too high.");
            }
            else
            {
                System.out.println(guessNum + " is too low.");
            }
            count++;
            System.out.print("What is your guess? ");
            guessNum = read.nextInt();
        }
 
        System.out.println("\nCorrect! You only needed " + count + " guesses to get it!");    
    }
 
}
 

Also, can this be done using a for loop? As always I appreciate your advice and guidance!

[JosAH]

Look at your main() method: you only read collegeTry once before the while loop
starts and it keeps its value (it is never changed), so if the value is one of the
affirmative values the while loop keeps on looping.

kind regards,

Jos

[KoreyAusTex]

Look at your main() method: you only read collegeTry once before the while loop
starts and it keeps its value (it is never changed), so if the value is one of the
affirmative values the while loop keeps on looping.

kind regards,

Jos

Not sure what you meant, but I think I might have fixed it? The only thing I am having trouble with is when I enter -1 as a guess, it should print the message and then terminate, but I think it has something to do with boolean and int types not working together? Any suggestions?

import java.util.*;
public class GuessNumber 
{
    public static void main(String[] args) 
    {
       Scanner read = new Scanner(System.in);
       System.out.print("Do you want to play a game? ");//War Games!
       String collegeTry = read.next();
       collegeTry = collegeTry.toLowerCase();
       while (((collegeTry.equals("yeah")) || (collegeTry.equals("sure")) || (collegeTry.equals("ok"))))
       {
           game();
           System.out.print("\nDo you want to play a game? ");
           collegeTry = read.next();
           collegeTry = collegeTry.toLowerCase();
       }
    }
 
    public static void game() 
    {
        Scanner read = new Scanner(System.in);
        Random gen = new Random();
        int randNum = gen.nextInt(100) + 1; // pick a number between 1 & 100
        System.out.println("\nWelcome to the High-Low Guessing Game!" + 
        "Try to guess the number I've chosen between 1 and 100.");
        System.out.print("\nWhat is your guess? ");
        int guessNum = read.nextInt();
        int count = 1;
 
        while (guessNum != randNum) 
        {
            if(guessNum > randNum)
            {
                System.out.println(guessNum + " is too high.");
            }
            else if(guessNum < randNum)
            {
                System.out.println(guessNum + " is too low.");
            }
            else if(guessNum == -1)
            {
                System.out.println("You stopped the game after " + count + " guess(es)!");
            }
 
            count++;
            System.out.print("What is your guess? ");
            guessNum = read.nextInt();
        }
 
        System.out.println("Correct! You only needed " + count + " guesses to get it!");    
    }
 
}
 

[trdeepak]

Try using

try{

} catch

block

[KoreyAusTex]

Try using

try{

} catch

block

Actually you are using concepts we have yet to learn

[nomad]

Not sure what you meant, but I think I might have fixed it? The only thing I am having trouble with is when I enter -1 as a guess, it should print the message and then terminate, but I think it has something to do with boolean and int types not working together? Any suggestions?

import java.util.*;
public class GuessNumber 
{
    public static void main(String[] args) 
    {
       Scanner read = new Scanner(System.in);
       System.out.print("Do you want to play a game? ");//War Games!
       String collegeTry = read.next();
       collegeTry = collegeTry.toLowerCase();
       while (((collegeTry.equals("yeah")) || (collegeTry.equals("sure")) || (collegeTry.equals("ok"))))
       {
           game();
           System.out.print("\nDo you want to play a game? ");
           collegeTry = read.next();
           collegeTry = collegeTry.toLowerCase();
       }
    }
 
    public static void game() 
    {
        Scanner read = new Scanner(System.in);
        Random gen = new Random();
        int randNum = gen.nextInt(100) + 1; // pick a number between 1 & 100
        System.out.println("\nWelcome to the High-Low Guessing Game!" + 
        "Try to guess the number I've chosen between 1 and 100.");
        System.out.print("\nWhat is your guess? ");
        int guessNum = read.nextInt();
        int count = 1;
 
        while (guessNum != randNum) 
        {
            if(guessNum > randNum)
            {
                System.out.println(guessNum + " is too high.");
            }
            else if(guessNum < randNum)
            {
                System.out.println(guessNum + " is too low.");
            }
            else if(guessNum == -1)
            {
                System.out.println("You stopped the game after " + count + " guess(es)!");
            }
 
            count++;
            System.out.print("What is your guess? ");
            guessNum = read.nextInt();
        }
 
        System.out.println("Correct! You only needed " + count + " guesses to get it!");    
    }
 
}
 

On the part:
Do you want to play a game?
you might want to print on the screen enter yeah, sure or ok. If you don't that person will never get in.

[nomad]

Not sure what you meant, but I think I might have fixed it? The only thing I am having trouble with is when I enter -1 as a guess, it should print the message and then terminate, but I think it has something to do with boolean and int types not working together? Any suggestions?

import java.util.*;
public class GuessNumber 
{
    public static void main(String[] args) 
    {
       Scanner read = new Scanner(System.in);
       System.out.print("Do you want to play a game? ");//War Games!
       String collegeTry = read.next();
       collegeTry = collegeTry.toLowerCase();
       while (((collegeTry.equals("yeah")) || (collegeTry.equals("sure")) || (collegeTry.equals("ok"))))
       {
           game();
           System.out.print("\nDo you want to play a game? ");
           collegeTry = read.next();
           collegeTry = collegeTry.toLowerCase();
       }
    }
 
    public static void game() 
    {
        Scanner read = new Scanner(System.in);
        Random gen = new Random();
        int randNum = gen.nextInt(100) + 1; // pick a number between 1 & 100
        System.out.println("\nWelcome to the High-Low Guessing Game!" + 
        "Try to guess the number I've chosen between 1 and 100.");
        System.out.print("\nWhat is your guess? ");
        int guessNum = read.nextInt();
        int count = 1;
 
        while (guessNum != randNum) 
        {
            if(guessNum > randNum)
            {
                System.out.println(guessNum + " is too high.");
            }
            else if(guessNum < randNum)
            {
                System.out.println(guessNum + " is too low.");
            }
            else if(guessNum == -1)
            {
                System.out.println("You stopped the game after " + count + " guess(es)!");
            }
 
            count++;
            System.out.print("What is your guess? ");
            guessNum = read.nextInt();
        }
 
        System.out.println("Correct! You only needed " + count + " guesses to get it!");    
    }
 
}
 

try this instead...
if(guessNum == -1);

also you will need to stop the program some how after you type -1
and move this
System.out.println("Correct! You only needed " + count + " guesses to get it!");
somewhere...


Do you know why?


good luck


nomad

[KoreyAusTex]

try this instead...
if(guessNum == -1);

also you will need to stop the program some how after you type -1
and move this
System.out.println("Correct! You only needed " + count + " guesses to get it!");
somewhere...


Do you know why?


good luck


nomad

Do I know why what? That I have to move it?

[nomad]

Do I know why what? That I have to move it?

why you need to do this
if(guessNum == -1);
in stead of this
else if(guessNum == -1);


Did you do a test on your program. I think it's still not right.
What do you need to move is for you to figure out.


I probably should have made you figure it out by giving you hints.

nomad

[KoreyAusTex]

why you need to do this
if(guessNum == -1);
in stead of this
else if(guessNum == -1);


Did you do a test on your program. I think it's still not right.
What do you need to move is for you to figure out.


I probably should have made you figure it out by giving you hints.

nomad

Sorry I think you misunderstood me, I got confused, I understand I need to move it out, but I wasn't clear on what you were referring too.