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Path: utzoo!mnetor!seismo!think!ima!haddock!karl
From: karl@haddock
Newsgroups: net.lang.c
Subject: for != while
Message-ID: <86900030@haddock>
Date: Mon, 1-Sep-86 16:53:00 EDT
Article-I.D.: haddock.86900030
Posted: Mon Sep  1 16:53:00 1986
Date-Received: Tue, 2-Sep-86 21:06:56 EDT
Lines: 15
Nf-ID: #N:haddock:86900030:000:424
Nf-From: haddock!karl    Sep  1 16:53:00 1986


It's well known that the equivalence between for and while breaks down if
there's a "continue" statement.  Here's another case I just discovered:

main() {
	char *foo = "outer";
	for (;; printf(foo),exit(0)) {
		char *foo = "inner";
	}
}

This prints "outer" (vax SVR2 compiler), though the for-while equivalence
might lead one to expect "inner".

Karl W. Z. Heuer (ima!haddock!karl, karl@haddock.isc.com), The Walking Lint