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Java Forum / General / September 2006

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Positive and Negative integer counter

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StaR.BoY2005@gmail.com - 29 Sep 2006 05:05 GMT
Hello everyone,

I am working on a program that needs to read an unspecified number of
integers and determine how many positive and negative values there are.
Also, the program needs to end when the input is 0 (zero). Here is the
code I have which is causing me problems!!! I would greatly appreciate
all of the help!

import java.util.Scanner;
public class Counter
{

    public static void main(String[] args)
    {
         int inputNumber;
         int count;
         int number;

         Scanner keyboard = new Scanner(System.in);
         count = 0;
         number = 0;

         System.out.print("Enter your first integer: ");
         inputNumber = keyboard.nextInt();

         while (inputNumber >0);
         {
            count++;
            System.out.print("Enter your next integer, or 0 to end: ");
            inputNumber = keyboard.nextInt();
         }

         while (inputNumber <0);
         {
            number++;
            System.out.print("Enter your integer, or 0 to end:");
            inputNumber = keyboard.nextInt();
         }

         if (count == 0)
         {
             System.out.print("You didn't enter any data!");
          }
          else
          {
             keyboard.nextInt();
             System.out.print("You entered " + count + " positive
integers.");
             System.out.print("You entered " + number + " negative
integers.");
          }

    }

}

Thanks again.

--John
PofN - 29 Sep 2006 06:35 GMT
> Hello everyone,
>
[quoted text clipped - 3 lines]
> code I have which is causing me problems!!! I would greatly appreciate
> all of the help!

Take your homework, shove it and piss off.
Manish Pandit - 29 Sep 2006 06:56 GMT
You need to :

1. Put all this in 1 while loop that prompts the user for input
2. Put a break condition in your while loops
3. Bulletproof your code so that if non-numeric data is entered, the
code handles it gracefully.

-cheers,
Manish
Patricia Shanahan - 29 Sep 2006 14:49 GMT
> Hello everyone,
>
[quoted text clipped - 3 lines]
> code I have which is causing me problems!!! I would greatly appreciate
> all of the help!

For this type of thing, I would try play-the-computer.

Write yourself some test data. Write the name of each variable on a
whiteboard, or a large piece of paper with room to writing in and cross
off multiple values for each variable.

Do what your program tells the computer to do, keeping a note of the
current value of each variable. Are the results what you want? If not,
what would you really do, if you were trying to do this task?

Patricia


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