post-decrement quirk?

[Dale Worley]

In article <1991Jun17.230838.9628 at auto-trol.com> julbro at auto-trol.com (Julie Brown) writes:
   Can anyone explain to me why the following does not work 
   (at least on the Sun):
	q = q--;
   pre-increment works just fine (q = --q;).

According to Ansi C, neither of these is valid, because they both
modify q twice between two sequence points (during a statement).  The
fact that the second happens to do what you want it to is luck.

BTW, what *is* it that you want to do?  "q--" is equivalent to "q = q-1"
already, so you don't have to assign the result to q...

Dale Worley		Compass, Inc.			worley at compass.com
--
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