Message-ID: <32A02E68.5A61@pobox.oleane.com>
Date: Sat, 30 Nov 1996 13:54:00 +0100
From: Francois Charton <deef AT pobox DOT oleane DOT com>
Organization: CCMSA
MIME-Version: 1.0
To: afonso AT inesca DOT inesca DOT pt
CC: djgpp AT delorie DOT com
Subject: Re: Problems with DJGPP V2.01 - atof() function
References: <329e68a5 DOT 10316617 AT news DOT ua DOT pt>
Content-Type: text/plain; charset=us-ascii
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afonso AT inesca DOT inesca DOT pt wrote:
> 
>        Problems with DJGPP V2.01 - atof() function
> 
>         Hi!
> 
>         Recently I've made an upgrade of my application from V1.xx
> to V2.01 of DJGPP. In V1.xx my application is working properly.
>         After all the corrections I made in source files, due to
> the changes in DJGPP Include files, I finally obtained an
> executable file. But, when I tried to execute it, I got a crash
> of my application! I made a debug and I found the cause of my
> crash that is an incorrect return of atof() function. I'm using
> it as in the example below:
> 
>                 char string[]="1.13";
>                 int  result;
>                 ...
>                 result = (int)(atof(string)*100);
>                 ...
> 
>         I've got result = 112!!! not 113 as I wished, because
> the function atof() return is 1.29999... not 1.13 (and I only have
> an old i386).
>         I think that problem is a bug of DJGPP Library V2.xx.


Not in the library but in the compiler (I'd say)
To work around, just do:
 
   char string[]="1.13";
   float f;
   int  result;
       ...
   f = (int)(atof(string)*100);
   result= (int) f;

result should now be 113...

Francois