Path: utzoo!mnetor!uunet!husc6!mit-eddie!uw-beaver!cornell!rochester!PT.CS.CMU.EDU!cadre!pitt!darth!investor!rbp
From: rbp@investor.UUCP (Bob Peirce)
Newsgroups: comp.lang.c
Subject: Re: Is this a bug, or is it just me?
Message-ID: <881@investor.UUCP>
Date: 22 Dec 87 19:58:44 GMT
References: <464@ecrcvax.UUCP>
Organization: Cookson, Peirce & Co., Pittsburgh, PA
Lines: 27

> I think I have found a problem.  I know that operations of the same 
> precedence can be reordered by the compiler, but I wouldn't think that
> all three auto-increments would be done after all the additions.  This
> happens on both a vax (4.3bsd) and a Sun-3.
> 
> #include <stdio.h>
> 
> int sum = 0;
> int a[3] = {1, 4, 16};
> int i = 0;
> 
> main () {
>     sum = a[i++] + a[i++] + a[i++];
>     printf ("sum: %d      i:%d\n", sum, i);
> }
> 
> Results in:
> sum: 3      i:3
> 
> 			 John Gregor
> 		johng%ecrcvax.UUCP@germany.CSNET

I get "sum: 21    i:3" on an Altos 3068 (M68020).
-- 
Bob Peirce, Pittsburgh, PA				 412-471-5320
uucp: ...!{allegra, bellcore, cadre, idis, psuvax1}!pitt!investor!rbp
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