Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site brl-tgr.ARPA Path: utzoo!linus!philabs!cmcl2!seismo!brl-tgr!gwyn From: gwyn@brl-tgr.ARPA (Doug Gwyn) Newsgroups: net.lang.c Subject: Re: Re: Breaking out of several nested loops (& ANSI C) Message-ID: <5316@brl-tgr.ARPA> Date: Mon, 15-Oct-84 20:25:16 EDT Article-I.D.: brl-tgr.5316 Posted: Mon Oct 15 20:25:16 1984 Date-Received: Wed, 17-Oct-84 19:33:38 EDT References: <129@ssc-vax.UUCP>, <1801@pegasus.UUCP> <4886@duke.UUCP>, <2085@rochester.UUCP>, <4901@duke.UUCP> Organization: Ballistics Research Lab Lines: 16 Gee, I thought everyone knew that the most general structured loop is startloop ... on condition (...) leaveloop ... repeatloop which can mimic a "while" or "do .. while" loop if one or the other of the body sections is null. The rules for "structuredness" seem to be: a loop invariant is being maintained (and is stated EXPLICITLY, perhaps in a comment), the loop is entered at the top, and there is only one exit from the loop. C's "break" and "continue" violate this just as much as a "goto" would. But so what; a conscientious program designer will "think structured" no matter what language he is using. I have yet to see an automated tool (including ADA) for enforcing proper programming practice that can compensate for ignorance or stupidity on the part of its user.