Xref:	news2.mv.net comp.os.msdos.djgpp:7846
From:	"John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Getc(), putc() and feof() acting very wierdly
Date:	Sun, 25 Aug 1996 01:04:49 -0700
Organization:	Three pounds of chaos and a pinch of salt
Lines:	26
Message-ID:	<32200921.2445@cs.com>
References:	<4vockq$ri5 AT nuntius DOT u-net DOT net>
NNTP-Posting-Host:	ppp220.cs.com
Mime-Version:	1.0
To:	sam AT beavis DOT u-net DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Sam wrote:
> 
> Now for my problem. I've written a very simple program to change the
> Windows wallpaper by copying one BMP to another. It randomly picks a
> BMP and copies it. Normally it works as expected, but a couple of
> files only copy the first few K, an 8578 byte file only gets to 1210
> bytes. It all exits as normal, and it all looks the most standard C I
> can write.
>
> which is about as simple as I can think of. Infile and outfile are
> both FILE * s, and are opened and closed with fopen and fclose as mode
> "r" and "w".  ^^^^^^^^^^^^

This is your problem.  Bitmaps are *binary* files, not text files.  You
must open them with "wb" and "rb", respectively.

When a file is in text mode, the 'EOF' character is read as the end-of-
file marker, while in binary mode all characters are considered part of
the file.

-- 
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| John M. Aldrich, aka Fighteer I     |       fighteer AT cs DOT com              |
| Proud owner of what might one day   |  Plan: To make Bill Gates suffer   |
| be a spectacular MUD...             |  Tagline: <under construction>     |
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