Newsgroups: comp.os.msdos.djgpp
From: Steve Gibson <gibson AT ccis DOT adisys DOT com DOT au>
Subject: Re: Problem with DJGPP?
Content-Type: text/plain; charset=us-ascii
Message-ID: <33572013.3021@ccis.adisys.com.au>
Sender: usenet AT ccis DOT adisys DOT com DOT au (usenet)
Nntp-Posting-Host: herring
Reply-To: gibson AT ccis DOT adisys DOT com DOT au
Content-Transfer-Encoding: 7bit
Organization: ADI Limited
References: <334C222A DOT 4F9 AT lynx DOT dac DOT neu DOT edu> <E8G8t3 DOT 3K8 AT fcshome DOT stoneham DOT ma DOT us>
Mime-Version: 1.0
Date: Fri, 18 Apr 1997 07:17:39 GMT
Lines: 58
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk

Fred Smith wrote:
> 
> J.D. Piette (pjames AT lynx DOT dac DOT neu DOT edu) wrote:
> : Hi,
> 
> : I recently downloaded DJGPP(the GCC2721 version) and RHIDE v1.2 and got
> : everything set up and running fine.  BTW I think the program is
> : wonderful and I am thoroughly enjoying using it.
> 
> Great!
> 
> : My problem is that when I call the function atof(), it returns a value
> : of 1.00. Here is the code segment.
> 
> :    char buffer[80];
> :    double price;
> :    ....
> :    ....
> :    printf("\n\nCurrent Price?");
> :    gets(buffer);
> :    if(buffer[0]!='\0')
> :    {
> :       price=atof(buffer);
> :    }
> 
> : price always has a value of 1.00.  I looked at it in the debugger and
> : buffer has the correct value and if I use atoi() the correct number is
> : assigned to price(the integer value).  Any information as to why this is
> : happening would be greatly appreciated.  Please reply by e-mail.
> 
> I don't see a declaration of atof() (or more correctly an include that
> contains the declaration) here anywhere. Most likely the compiler does not
> see one either, so it ASSUMES that atof returns an int.
> 
> You've got to make sure to include the correct headers! In this case it
> should be stdlib.h.
> 


Yeh! If you're not carefull to use prototypes / headers correctly that
can be a 
real trap. I spent one (not so) memorable late night / early morning a
tracking
down a very similar problem to the one described. Once you figure out
what is
hapening, it's *obvious* D'oH !

Later SG


-- 
Steve Gibson
ADI Limited, CCIS Systems Group 
Email: gibson AT ccis DOT adisys DOT com DOT au
Snail: 22 Stirling Hwy
       Nedlands
       Western Australia
Nbrs : (tel) +61 9 333 8917    (fax) +61 9 333 8889