Re: Konvalina/Wileman exercises

"Richard Heathfield" <rjh@[EMAIL PROTECTED]
> wrote in message 
news:Bc2dncCZNdOsdrDbnZ2dnUVZ8tfinZ2d@[EMAIL PROTECTED]
>
> Another six are up now for peer review:
>
> http://www.cpax.org.uk/prg/****table/pascal/pwp/exercises/ch04/index.php
>
> #1 is ugly, no two ways about it. I was determined to use loops, even
> when it meant coming up with the most truly abysmal customised hash
> I've ever seen.

Have 'for' loops been introduced at that stage into the text? If so,
instead 
of:

  v := 0;
  while v < 4 do
  begin
    getvertex(v + 1, x[v], y[v]);
    v := v + 1;
  end;

While this is logically correct, I would prefer:

    for v := 0 to 3 do GetVertex(v + 1, x[v], y[v]);

The rule that I use to determine which type of loop to use goes something 
like this:

Choose the first type of loop that satisfies the requirements from this 
ordered list:

1. If the number of iterations is predetermined before entry into the
loop, 
use a 'for' loop
2. If the statements in the loop are executed zero or more times use a 
'while' loop
3. If the statements in the loop are repeated at least once use a 'repeat'

loop

--
Chris Burrows
CFB Software
http://www.cfbsoftware.com/gpcp