PRB: Incorrect Evaluation of Equation with Variables

 Last reviewed: February 28, 1997
Article ID: Q164359
5.00 5.00a WINDOWS kbprg kbprb

The information in this article applies to:

  • Microsoft Visual FoxPro for Windows, versions 5.0

SYMPTOMS

In Visual FoxPro 5.0, an equation that contains variables may not be evaluated correctly.

STATUS

Microsoft is researching this behavior and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

In the Command window, issue the following commands: 

   SET DECIMALS TO 5
   mVar = 1
   ? mVar + (1048575+(mVar/1000)) = 1048576.001
The value .T. (True) should be echoed to the screen but .F. is returned instead.

The following recommendations may be used as alternative solutions to this problem:

  • Replacing mVar (inside the parentheses) with 1 exhibits the correct behavior, as does removing the outside parentheses.
  • Using the ROUND() function may also solve this problem: 

          ? ROUND(mVar+(1048575+(mVar/1000)), 5) = 1048576.001

This behavior does not occur in Visual FoxPro 3.0.

KBCategory: kbprg kbprb
KBSubcategory: FxprgGeneral
Additional reference words: 5.00 5.00a vfoxwin
Keywords : FxprgGeneral kbprb kbprg
Version : 5.00 5.00a
Platform : WINDOWS

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Last reviewed: February 28, 1997
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