[plt-scheme] HTDP Exercise 9.5.7

In my unsuspectingness I did not conscientially realize that a complete answer was posted. Therefore, and because I am just a 
visitor of this list and do not have any authority on this list, I did not yell about it. In my answer I should have erased that the 
scheme code from the original message. My apollogies. Please note that my answer is just a hint.
Jos

----- Original Message ----- 
From: "Todd O'Bryan" <toddobryan at gmail.com>
To: "S Brown" <ontheheap at gmail.com>; "PLT-Scheme Mailing List" <plt-scheme at list.cs.brown.edu>
Sent: Monday, April 13, 2009 6:55 PM
Subject: Re: [plt-scheme] HTDP Exercise 9.5.7


I just got yelled at for posting complete code to one of the book
problems, so I'll yell this time: try to avoid posting complete
answers to book exercises--instead post enough info so people know
what you're asking and you can send code to individuals rather than
the whole list if needed.


----- Original Message ----- 
From: "Matthias Felleisen" <matthias at ccs.neu.edu>
To: "Todd O'Bryan" <toddobryan at gmail.com>
Cc: "PLT-Scheme Mailing List" <plt-scheme at list.cs.brown.edu>
Sent: Monday, April 13, 2009 6:56 PM
Subject: Re: [plt-scheme] HTDP Exercise 9.5.7


>
> Thanks for yelling.
>
> I answered in private and it is NOT a violation of design, in the
> spirit of HtDP, but a good example of
>
>  -- figure out the tasks involved
>  -- design one function per task.
>
> It just happens to be the first exercise that throws students back to
> this rule introduce earlier in the book and not exercised.
>
> -- Matthias