OT: Programming in C
Bill Davidsen
davidsen at tmr.com
Mon Apr 21 17:41:27 UTC 2008
Les Mikesell wrote:
> Bill Davidsen wrote:
>>
>>> Quiz for next Friday. What are these and what's the difference
>>> between them:
>>>
>>> int (*(**p)[])(int)
>> declare p as pointer to pointer to array of pointer to function (int)
>> returning int
>>
>>> and
>>> int *(*(**p)[])(int)
>> declare p as pointer to pointer to array of pointer to function (int)
>> returning pointer to int
>>
>> I would really want to see both a justification of method and
>> certificate of sanity to someone who actually used either. I can just
>> barely justify pointer to array of function returning int (state
>> machines), these look like something a compiler compiler would do.
>
> I sort of recall using a pointer to an array of structs as the basic
> data type for anything significant in C but I've mostly forgotten why. I
> think sometimes it had to do with getting usable semantics to access
> things in shared memory segments.
>
Pointer to struct is the heart of good linked lists, and a pointer to
array of struct is certainly a reasonably use. I certainly use arrays of
pointers to functions, both for state machines and and emulators, after
that it gets very hard to maintain.
--
Bill Davidsen <davidsen at tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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