Mandelbrot Example Needs to Change "LogicY" to a SINGLE (44492)


The information in this article applies to:

  • Microsoft QuickBASIC 4.0
  • Microsoft QuickBASIC 4.0b
  • Microsoft QuickBASIC 4.5
  • Microsoft BASIC Compiler for MS-DOS and OS/2 6.0
  • Microsoft BASIC Compiler for MS-DOS and OS/2 6.0b
  • Microsoft Basic Professional Development System (PDS) for MS-DOS and MS OS/2 7.0
This article was previously published under Q44492

SUMMARY

The MANDEL.BAS program example on Pages 213-217 of the "Microsoft QuickBasic 4.5: Programming in Basic" manual for Version 4.50, on Pages 263-267 of the "Microsoft QuickBasic 4.0: Programming in Basic: Selected Topics" manual for Versions 4.00 and 4.00b, and on Pages 211-215 of the "Microsoft Basic 7.0: Programmer's Guide" for Microsoft Basic PDS Version 7.00 does not work correctly for all WINDOW coordinates, unless the variable "LogicY" is changed to a SINGLE or DOUBLE precision variable.

To correct the problem, change all occurrences of LogicY to LogicY! or add the following line to the beginning of the program: 
   DIM LogicY AS SINGLE
This information applies to QuickBasic Versions 4.00, 4.00b, and 4.50 for MS-DOS, to Microsoft Basic Compiler Versions 6.00 and 6.00b for MS-DOS and MS OS/2, and to Microsoft Basic PDS Version 7.00 for MS-DOS and MS OS/2.

For more information, query on the following words in this Knowledge Base:

PMAP and MAP and WINDOW and INTEGER

Modification Type:MinorLast Reviewed:8/16/2005
Keywords:KB44492
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