From:	Endlisnis <s257m AT unb DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: fstream.open??
Date:	Tue, 11 Aug 1998 18:27:01 -0300
Organization:	NBTel Internet
Lines:	26
Message-ID:	<35D0B724.CBFBEFC9@unb.ca>
References:	<35D04D17 DOT 187A AT efd DOT lth DOT se>
NNTP-Posting-Host:	fctnts12c27.nbnet.nb.ca
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Peter Danielsson wrote:

> I want to change the first byte in a file using fstream. If i use
> fil.open then fil.write(&ch,1) then fil.close() I get a 1byte large file
> only including ch. What can I do??
>
> /Peter

Try this:
fstream File(Filename, ios::app);
File.seekp(0,ios::beg);
File.write("a",1);
File.close();


I think there is a way to open a file so that it starts at 0 but is not
truncated, but I don't know how.  There is a enum for it "ios::trunc" but
that seems to be the default, I wonder how you can unset that?

--
     (\/) Endlisnis (\/)
          s257m AT unb DOT ca
          Endlisnis AT GeoCities DOT com
          Endlis AT nbnet DOT nb DOT ca

- Raw text -