From:	Bob Lied <lied AT lucent DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: printf bug ???
Date:	Fri, 05 Jun 1998 15:34:29 -0500
Organization:	Lucent Technologies
Lines:	10
Message-ID:	<35785655.74D7EAD3@lucent.com>
References:	<35784752 DOT B7BF8C31 AT hamburg DOT netsurf DOT de>
NNTP-Posting-Host:	il0015lied1.ih.lucent.com
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

>     printf("%d %d %d", i, i++, i++);
> Using DJGPP I got the output "3 2 1" which is wrong.
> I also compiled this with Visual C++ 5 and the output was "1 1 1".
> Can anyone help me solve this?

The solution is, "Don't do that."  The order of parameter
evaluation is compiler-dependent, and the order of applying
multiple post-increments is compiler-dependent. Depending on
the compiler, you could also get "1 1 2", "1 2 3", or "3 3 3".
Be less clever, it's easier for the compiler and the reader.

- Raw text -