From: horst DOT kraemer AT snafu DOT de (Horst Kraemer)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: How to print a control-key on a file?
Date: Sat, 02 Oct 1999 19:08:01 GMT
Organization: [Posted via] Interactive Networx
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References: <37F62262 DOT 7CDAE6C1 AT pd DOT jaring DOT my>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

On Sat, 02 Oct 1999 23:18:58 +0800, dsk <dseeker AT pd DOT jaring DOT my> wrote:

> I HADDD been trying all the stuff and I still can't print control key
> (eg ascii 10,11) to
> a file. I got odd results in the output file.

Open the file in binary mode:

	fp = fopen("stuff","wb");
	fp = fopen("stuff","rb");

By default "r" and "w" open in text mode. In text mode  (char)10=='\n'
is translated by DOS compilers to the sequence 13 10 and 13 10 are
read back as a single (char)10=='\n'.

You may read back a "text" file written "wb" even with "r". DOS
compilers like DJGPP will treat a single 10 without preceding 13 as
valid \n.


Regards
Horst