> From: Richard A. Smith [mailto:[EMAIL PROTECTED]]
>
> On Mon, 18 Oct 1999 12:16:32 +0100, Mathew Hendry wrote:
>
> >int
> >sum_array_ar(int *array, long len) {
>
> I just noticed that you pass array into the function in pointer
> notation but then use it as an array inside the funtion. I have a C
> purist friend who claims that this is bad and has test cases where
> this can cause problems. Although I can't remember what they were.
> (I will forward it to him and ask and post the results) I think it
> has to do with multi-diminsional arrays.
Yes. For an n-dimensional array, you need to know (at least) the last n-1
dimensions to be able to index it properly. So, for a 3-D array, you would
need at least
int func(int data[][YDIM][ZDIM]);
but
int func(int data[XDIM][YDIM][ZDIM]);
would work just as well.
> IIRC he claims that the proper function definition should be:
>
> sum_array_ar(int array[SIZE], long len) {
As far as C is concerned
void func(int *a);
void func(int a[]);
void func(int a[1024]);
are equivalent. Try it with "gcc -W -Wall -ansi -pedantic" - not a whisper.
Lint might complain, though...
-- Mat.
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