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From: gjs@k.cs.cmu.edu (Gregory Stein)
Newsgroups: net.micro.mac
Subject: Megamax bug?
Message-ID: <1023@k.cs.cmu.edu>
Date: Mon, 9-Jun-86 16:04:55 EDT
Article-I.D.: k.1023
Posted: Mon Jun  9 16:04:55 1986
Date-Received: Wed, 11-Jun-86 00:54:53 EDT
Reply-To: gjs@k.cs.cmu.edu (Gregory Stein)
Distribution: net
Organization: Carnegie-Mellon University, CS/RI
Lines: 15

Keywords:


I'm working in Megamax C, and I noticed a problem while I was in the
debugger.  It comes from these statements:

	for (i = ntables; i--; ) <statement>
	if (i == -1) <more statements>

I would expect this to get the value of i, decrement the stored value,
and then exit or execute the statement.  Rather, it tests the value
before it decrements, and the loop exits with i = 0.  Is this a bug
in the code generation, or is C supposed to do this?

	Greg