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From: heff@flnexus.ATT.COM (Paul K Heffner)
Newsgroups: comp.sys.ibm.pc
Subject: Turbo C division bug
Message-ID: <105@flnexus.ATT.COM>
Date: Thu, 18-Jun-87 11:41:53 EDT
Article-I.D.: flnexus.105
Posted: Thu Jun 18 11:41:53 1987
Date-Received: Sun, 21-Jun-87 14:08:53 EDT
Organization: AT&T-IS, Orlando, FL
Lines: 17

A couple of people at our site have invested in Turbo C and seem generally
pleased with the package as a really serious compiler (especially for
the price). It does, however, seem to have a serious bug with the floating
point division routines. If your program does division on two constants:

float x;

x = 5.0/4.0;

The result will be as if the division was inverted (i.e x = 4.0/5.0)

Spencer Katt commented on this in PC Week this week. If you're using
Turbo C for serious programming, you should exercise caution if doing
such calculations. (I assume Borland is working on a fix....)

Paul Heffner,
AT&T, Orlando