Thread: For loop; Problems with my for loop

(I realize my title is bad - I forgot to go back and change it)

Hi,

I am trying to make a program that has a user try to guess a number. I'm using a for loop for this purpose. My problem is after the for loop is over, it does not run the dialog box part of the code. If I move the dialog box part above the for loop it will work.

What do I need to do in order for it to do the dialog box once the for loop is finished?

Here is this part of my code:

for (int i = 1; i <= 5; i++) 
  {
    numguess = scan.nextDouble();    
    if (numguess == num)     System.out.print ("Yay! You guessed correctly!");
        else if (numguess <= num) System.out.print ("Choose a higher number.");
        else if (numguess >= num) System.out.print ("Choose a lower number.");  
  }
 
String input = JOptionPane.showInputDialog("Do you want to continue to play: y or n");
System.exit(0);
 
String playn = scan.next();
if (playn.equalsIgnoreCase("n"))
     play = false;

'

import java.util.Random;
import java.util.Scanner;
import javax.swing.JOptionPane;
 
public class hilo {
    public static void main(String[] args){
   double numguess;
 
   boolean play = true;
 
while(play){
    //boolean play = true;
    Random randNum = new Random();
    int num = randNum.nextInt(100);
 
Scanner scan = new Scanner(System.in);
System.out.print ("Enter your guess\n ");
 
for (int i = 1; i <= 5; i++) 
  {
    numguess = scan.nextDouble();    
    if (numguess == num)     System.out.print ("Yay! You guessed correctly!");
        else if (numguess <= num) System.out.print ("Choose a higher number.");
        else if (numguess >= num) System.out.print ("Choose a lower number.");  
  }
 
String input = JOptionPane.showInputDialog("Do you want to continue to play: y or n");
System.exit(0);
 
 
String playn = scan.next();
if (playn.equalsIgnoreCase("n"))
 
     play = false;
 
}
}

If you want help, I suggest you provide an SSCCE that we can run- make it as short as possible (we don't actually have to play the game) while still demonstrating the problem.

Also, why is that System.exit() in there?

Originally Posted by mingleth

I don't know how to make it shorter while demonstrating the problem, so I just went back and added my entire code. I don't think it's a very long program...

I don't see your entire program. I see some undeclared variables and some code that's not in a method.

Originally Posted by mingleth

I have the System.exit() in there because I thought I needed it if I am going to use the dialog box. I could be wrong about it...

What happened when you tested that theory?

Originally Posted by KevinWorkman

Also, why is that System.exit() in there?

My thoughts exactly. I would have thought that it would not compile with an "unreachable statement" error.