DOCUMENT:Q242467  27-JUL-2001  [foxpro]
TITLE   :FIX: Dividing 0 by 0 Returns Garbage Chars or Incorrect Number
PRODUCT :Microsoft FoxPro
PROD/VER:WINDOWS:6.0
OPER/SYS:
KEYWORDS:kbDatabase kbSQL kbvfp600 kbvfp600bug KbDBFDBC kbVS600sp3fix kbGrpDSFox kbDSupport kbSQ

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual FoxPro for Windows, version 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

You perform a division where the divisor and dividend are both 0. The return
value should be ******, but instead, a combination of ASCII characters or
numerals and asterisks is returned. Additionally, if you perform such a
calculation as a select item in a SQL SELECT statement, you might see an
incorrect numeric return value.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3.

For more information about Visual Studio service packs, please see the following
articles in the Microsoft Knowledge Base:

   Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

   Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

Simple Zero Division:

1. Execute the following commands in the Command window:

   lnX = 0/0
   ?lnX

2. Look at the return value printed to the desktop. Note that you see an
   underscore or hyphen, followed by several garbage characters, followed by a
   series of asterisks.

Zero Division in SQL SELECT Statement:

1. Run the following code from a program (.PRG) file:

   CREATE CURSOR c1 (f1 n(5), f2 n(5), f3 N(5), f4 N(5))
   INSERT INTO c1 VALUES (3,2,0,0)
   SELECT f1/f2 as q1, f4/f3 AS q2;
      FROM c1;
      INTO CURSOR c2
   BROWSE NOWAIT
   ?q2

2. The value appearing in the second column of the BROWSE window is
   -.5000*****.**. Note that the return value printed to the desktop is -0.5000.

(c) Microsoft Corporation 1999, All Rights Reserved. Contributions by Jim
Saunders, Microsoft Corporation.


Additional query words:

======================================================================
Keywords          : kbDatabase kbSQL kbvfp600 kbvfp600bug KbDBFDBC kbVS600sp3fix kbGrpDSFox kbDSupport kbSQLProg 
Technology        : kbVFPsearch kbAudDeveloper kbVFP600
Version           : WINDOWS:6.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 2001.