[racket] exercise's question

oke,

On 87 I have to made a choice so the user can choose between a Vcat and 
a VCham so one animal and one gauge.
I have then to think how I can prevent that whn the user chooses a Vcham 
petting does not work.


Thanks for the help.

Roelof



Op 26-6-2012 16:38, Matthias Felleisen schreef:
>
> On Jun 26, 2012, at 10:21 AM, Roelof Wobben wrote:
>
>> Sorry for the confusion.
>>
>> I meant exercise 87 and 88 on the stable version of HtpD/2e.
>>
>> So the questions I have should be :
>>
>> Is it correct that on exercise 87 of How to design Programms I have 
>> to make 2 gauges and two animals.
>> And is exercise 88 part 1 not the same as exercise 56 ?
>>
>>
>> Roelof
>
>
> I usually don't send out rich-text emails so sorry:
>
>
> Exercise 87: ...
>
> Design a world program that works with both cats and chameleons:
> ; A VAnimal is _either_
> ; – a VCat
> ; – a VCham
>
> versus
>
> Design a virtual pet program that supports both a virtual cat and a 
> virtual chameleon.
>
> The underline/bold should help -- Matthias
>


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.racket-lang.org/users/archive/attachments/20120626/bdc76c21/attachment.html>