X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f
Message-ID: <BAYC1-PASMTP01C1CD2938CB47905898FAEF300@cez.ice>
X-Originating-IP: [70.50.143.180]
X-Originating-Email: [april_white AT sympatico DOT ca]
Message-ID: <42585FA4.7010903@sympatico.ca>
Date: Sat, 09 Apr 2005 19:05:08 -0400
From: April White <april_white AT sympatico DOT ca>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5) Gecko/20031013 Thunderbird/0.3
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: djgpp AT delorie DOT com
Subject: Re: problem with saving struct to disk
References: <129 DOT 5a9df4a1 DOT 2f89aa98 AT cs DOT com>
In-Reply-To: <129.5a9df4a1.2f89aa98@cs.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-OriginalArrivalTime: 09 Apr 2005 23:08:03.0390 (UTC) FILETIME=[FB62CDE0:01C53D58]
Reply-To: djgpp AT delorie DOT com

KTrumpetsRule AT cs DOT com wrote:

>I'm having a problem saving a struct to disk using DJGPP.  Normally I'd think 
>the problem was me but in view of the fact that it works under SOME 
>circumstances, I'm not sure.  Here's the details.
>
>  
>
looks like someones homework :-)

The problem seems to be that you are accepting a POWER * parameter for 
the i/o functions, but you are then using

>    fwrite(&power_0, sizeof(power_0), 1, ptr_file);
>  
>
and

>    fread(&power_0, sizeof(power_0), 1, ptr_file);
>  
>

You seem to be saving the pointer to the POWER structure, not the POWER 
structure itself.

I've not compiled this, but try

  fwrite(power_0, sizeof(*power_0), 1, ptr_file);
and
  fread(power_0, sizeof(*power_0), 1, ptr_file);

The first param to fread() and fwrite() is a pointer to a thing, which 
power_0 is.  The second param is the size of one of those things

April

-- 
Eat well, stay fit, die any way.