Olin,

You are completely right about the misplaced colons. See you understand C 
better than you let on :)

And, you are also right about the mailroom reassignment.

Bob Ammerman
RAm Systems

----- Original Message ----- 
From: "Olin Lathrop" <olin_piclist@embedinc.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Thursday, February 17, 2005 7:56 AM
Subject: Re: [EE] Languages, was Bug in Microchip mcc18 std library?


> Bob Ammerman wrote:
>>    switch  (n)
>>        default::
>>            if (isprime(n))
>>                case 2: case 3: case 5: case 7: p = 1;
>>            else
>>                case 4: case 6: case 8 case 9: : p=0;
>>
>> If it is, what on earth does it do?  (and why!)
>
> I don't know enough about C to know whether its legal, and am too lazy to
> run it thru a compiler to see.  What is the double colon after DEFAULT?
> Shouldn't there be one colon after "8" and only one after "9"?
>
> In any case, it looks like this sets P to 1 if N is prime, and 0 if it's
> not.  Values from 2-9 are handled outright, and values outside that range
> are evaluated by the ISPRIME function.  At least that's what the intent
> appears to be.
>
> While this may be cutesy intellectual exercise, anyone who puts this in
> production code should be demoted to assistant mailroom clerk straight 
> away.
>
>
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