Go4Expert - program help

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- Java (http://www.go4expert.com/forumdisplay.php?f=21)

- - program help (http://www.go4expert.com/showthread.php?t=2112)

Code:

import javax.swing.*;

public class test

{

    public static void main(String[] args)

    {

        String input;

        int integer, total, another;

        do

        {

            input = JOptionPane.showInputDialog(null, "Enter a positive integer");

            integer = Integer.parseInt(input);

            if (isPositive(integer));

            {

            input = JOptionPane.showInputDialog(null, "Enter a positive integer");

            }

            total = addNumbers(integer); 

            JOptionPane.showMessageDialog(null,"The total of integers between  1 and " + integer + " is " + total);

            another = JOptionPane.showConfirmDialog(null, "Do you want to continue");

        }

        while (another == JOptionPane.YES_OPTION);

    }



public static boolean isPositive(int integer)

    {

        while(integer <= 0)

        {

        return true;

        }

        return false;

           

    }

public static int addNumbers(int integer)

    {

        int total = 0, count = 0;

        while(count < integer)

        {

            count = count + 1;

            total = total + count;

        }

        return total;

    }

}

Now i got a problem, u c my boolean method, well what i want to say is when its not a positive number then it should re prompt the user for a number(input = JOptionPane.showInputDialog(null, "Enter a positive integer")

But right now its not workin correctly.
can someone just help me wit that?
thanx

Re: program help

You have to simply use the continue statement after checking for positive number. Find the rectified code below.

Code: Java

import javax.swing.*;
 public class test
 {
     public static void main(String[] args)
     {
         String input;
         int integer, total, another;
         do
         {
             input = JOptionPane.showInputDialog(null, "Enter a positive integer");
             integer = Integer.parseInt(input);
             if (isPositive(integer))
                 continue;
             total = addNumbers(integer); 
             JOptionPane.showMessageDialog(null,"The total of integers between  1 and " + integer + " is " + total);
             another = JOptionPane.showConfirmDialog(null, "Do you want to continue");
         }
         while (another == JOptionPane.YES_OPTION);
     }
 
 public static boolean isPositive(int integer)
 {
     while(integer <= 0)
     {
     return true;
     }
     return false;
        
 }
 
 public static int addNumbers(int integer)
 {
     int total = 0, count = 0;
     while(count < integer)
     {
         count = count + 1;
         total = total + count;
     }
     return total;
 }
 
 }

Re: program help

thanks man, helped alot.

Re: program help

problem, its saying: variable another might not have been initialized but it is. Wat do i do?

Re: program help

i need some help, its not workin.... HELP... it just doesnt want to do wat i ask it to do????

Re: program help

Code:

import javax.swing.*;

public class test

{

    public static void main(String[] args)

    {

        String input;

        int integer, total, another;

        

        do

        {     

            input = JOptionPane.showInputDialog(null, "Enter a positive integer");

            integer = Integer.parseInt(input);

           

            if (isPositive(integer))

                input = JOptionPane.showInputDialog(null, "Enter a positive integer"); 

            

            total = addNumbers(integer);

            JOptionPane.showMessageDialog(null,"The total of integers between  1 and " + integer + " is " + total);

            another = JOptionPane.showConfirmDialog(null,"Do you want to contine");



        }

        while (another == JOptionPane.YES_OPTION);

    }



public static boolean isPositive(int integer)

    {

        if (integer < 0)

                      return true;

                else 

                      return false;

   

    

    }

public static int addNumbers(int integer)

    {

        int total = 0, count = 0;

        while(count < integer)

        {

            count = count + 1;

            total = total + count;

        }

        return total;

    }

}

iv edited it to the following code. it works to a certain extent. IE. i enter a positive it does the calculation. then i enter a negative it asks to re input the number. then i type another negative but now it does the calcualtion with the first negative somehow.
HOW DO I STOP THAT??
or any other ideas.
thanks

Re: program help

But I already gave you the solution, didn't you try that?

Re: program help

it said variable already may not have been initialized??

Re: program help

??? wats wrong wit it?

Re: program help

With the continue statment you can send it to the beginning of the loop everytime a specific condition is not satisfied, in your case a positive integer.