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From: guido@boring.UUCP
Newsgroups: net.lang.c
Subject: Re: goto jumps into loops
Message-ID: <6879@boring.UUCP>
Date: Sat, 19-Apr-86 11:29:52 EST
Article-I.D.: boring.6879
Posted: Sat Apr 19 11:29:52 1986
Date-Received: Wed, 23-Apr-86 20:11:20 EST
References: <69@brl-smoke.ARPA>
Reply-To: guido@mcvax.UUCP (Guido van Rossum)
Organization: "Stamp Out BASIC" Committee, CWI, Amsterdam
Lines: 26
Apparently-To: rnews@mcvax

Dave Harmon obviously doesn't know C and didn't bother to test the C
version of his example: it contains i=MAX instead of i==MAX and
while(in(..)) instead of while(!in(...)) -- the latter no doubt stemming
from a slavish translation of Pascal's until <condition>.
Nevertheless, his problem is not one that's solved better with the use
of goto's.  Here's my code (tested -- it didn't need debugging :-).

      wrtlist(s) set *s; {
	int count= 0; /* Counts elements in range currently being printed */
	int e;

	for (e= 0; e <= MAX; ++e) {
		if (in(e, s)) {
			if (count == 0)
				printf(" %d", e);
			++count;
		}
		else {
			if (count > 1) printf("-%d", e-1);
			count= 0;
		}
	}
      }

-- 
	Guido van Rossum, CWI, Amsterdam <guido@mcvax.UUCP>