From:	Blaine Hodge <bhodge AT gpu DOT srv DOT ualberta DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: printf bug ???
Date:	Fri, 05 Jun 1998 14:05:30 -0600
Organization:	University of Alberta
Lines:	27
Message-ID:	<35784F8A.AB5D79CC@gpu.srv.ualberta.ca>
References:	<Pine DOT GSO DOT 3 DOT 96 DOT 980605144528 DOT 10548A-100000 AT bert DOT eecs DOT uic DOT edu>
NNTP-Posting-Host:	async15-3.remote.ualberta.ca
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

> > #include <stdio.h>
> > void main(void)
> > {
> >     int i = 1;
> >     printf("%d %d %d", i, i++, i++);
> > }
> > Using DJGPP I got the output "3 2 1" which is wrong.
> 
> The reason you got 3 2 1 is because some compilers parse from right to
> left (I suppose DJGPP does that) and you should never do such statement,
> it's a bad programming practice and can cause unstable results.

Yup.  This is the correct response you should get.  Arguements are
popped onto the stack right to left for function calls.

>  > I also
> compiled this with
> Visual C++ 5 and the output was "1 1 1". > Can anyone help me solve this?

Then its VC at fault (gee, imagine that), sounds like its evaluating it
using the Pascal calling method, left to right, and not C/C++, right to
left.

-- 
Blaine Hodge
E-Mail: bhodge AT gpu DOT srv DOT ualberta DOT ca
WWW: http://www.ualberta.ca/~bhodge/

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