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From: olczyk@interaccess.com (Thaddeus L. Olczyk)
Subject: Re: Software landmines (was: Why C++ is successful)
Date: 1998/08/15
Message-ID: <35d534c3.42590371@nntp.interaccess.com>#1/1
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Date: 1998-08-15T00:00:00+00:00
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On Fri, 14 Aug 1998 14:13:10 GMT, dennison@telepath.com wrote:

>In article <dewar.903074236@merv>,
>  dewar@merv.cs.nyu.edu (Robert Dewar) wrote:
>> Andy said
>>
>> <<Ahh... but have you ever found a "good" reason for using it? I have used
>> goto in C and Pascal in certain rare cases, but I have always found clearer
>> ways to code these cases in Ada.
>> >>
>>
>> The two obvious uses vfor gotos in Ada are
>>
>> 1) to get a loop "continue" mechanism
>
>for a simple loop, embedding the rest of the loop code in the body of the if
>statement is clearer. For nested loops where you want to "continue" an outer
>loop, I can see it. Not that I'd do such a thing. As a "goto-holic" who has
>been straight for 10 years, the best bet is abstinence. One day at a time. :-)
>
Most experienced C programmers will tell you that continue is just a 
glorified goto.

>> For example, I find the following perfectly clear:
>>
>>    <<sort>> for J in 1 .. N - 1 loop
>>        if D (J) > D (J + 1) then
>> 	  Swap (D(J), D(J + 1));
>>           goto Sort;
>>        end if;
>>
>> It is a little tricky to program this without the goto and not make it
>> less clear. Actuallky many people who try this end up with a different
>> algorithm (hint: the above sort is cubic, it is NOT a quadratic bubble sort
>:-)
Assuming I've read your code correctly, a better way would be

 for J in 1 .. N - 1 loop
      continue=true;	
        if D (J) > D (J + 1) then
 	  Swap (D(J), D(J + 1));
           continue=false;
        end if;
       if continue then