Question

uses crt and division by zero

Asked by: leopard850

I am running windows 98 and using Turbo Pascal 7.0 (dos version) to run and teach pascal. I would like to clear the screen so I import (use) the "crt" unit and use the "clrscr" command but everytime I try it, the program crashes and says "division by zero". What is going on here?

thanks
-Gary;

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Asked On
1999-07-06 at 12:22:15ID10179328
Tags

pascal

,

zero

,

division

,

crt

,

uses

Topic

Pascal Programming Language

Participating Experts
4
Points
100
Comments
9

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Answers

 

by: TriskelionPosted on 1999-07-06 at 15:12:34ID: 1218589

I would reinstall the environment (TP7)
It sounds as if you may have a corrupt Turbo.TPL or other corrupt file.

 

by: kschangPosted on 1999-07-06 at 17:27:01ID: 1218590

Triskelion... the brains have been in those jars too long.

This is the infamous Error 200 for TP7. What happened is the older TP products, esp. the ones calling CRT component, had a TIMING routine that crashes if used on a computer that's too fast, since the timer routine returned 0 as time elapsed. See this URL: http://www.merlyn.demon.co.uk/pas-r200.htm#R200

 

by: TriskelionPosted on 1999-07-06 at 17:55:05ID: 1218591

Oops

 

by: mSHPosted on 1999-07-06 at 18:20:04ID: 1218592

Please refer to other question: What wrong????? (Q10177420)

This is CRT unit error. The variable for counter for the delay function in CRT just 16 bit, but in Pentium II 233MHz and above it will overflow. So you need a path. All available in some site:
  http://www.brain.uni-freiburg.de/~klaus/pascal/runerr200/

If U need, I'll Email it to U.


PS: Please read this: (from <a href="http://www.borland.com/devsupport/pascal/">http://www.borland.com/devsupport/pascal/</a>)

Runtime Error 200 - 'Divide by 0'

Applications that use the CRT unit may generate this error message when running on very fast machines (i.e. Pentium Pro 180 and above). The cause of this error is a timing loop that occurs as part of the initialization of the CRT unit. This timing loop counts how many clock ticks occur within the loop and then that number is divided by 55. The result of this division is a value that is too large to fit into an integer value. The 'Divide by 0' error message is the catch-all error that is displayed when this overflow occurs.

There are currently no Inprise endorsed patches for this problem. There are several user provided patches available on the internet that patch both the CRT unit as well as existing EXE files. The easiest way to obtain these patches is to go to www.altavista.digital.com and search on '+ bp7patch.zip + tppatch.zip' without the quotes.

These patches are not endorsed or supported by Inprise and are used at your own risk.

 

by: leopard850Posted on 1999-07-07 at 12:04:03ID: 1218594

The answer was wrong. Thanks to the people who actually did answer the question.

-Gary;

 

by: whatboyPosted on 1999-07-07 at 23:03:06ID: 1218595

So for who goes the points???

 

by: kschangPosted on 1999-07-08 at 10:38:27ID: 1218596

As I pinpointed the cause first, I believe I do. mSH was right behind me though.

 

by: leopard850Posted on 1999-07-08 at 12:33:17ID: 1218597

Since you were first, you get the points. Thanks alot and I fixed the problem with my class.

-Gary;

20120131-EE-VQP-002

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