No, that would be the equivalent of
char *token[] // array of pointers
not
char token[][] // array of arrays.
You have to know the size of every dimension in the array except the
last one to do anything with it. Usually that's all done by the
compiler. If you know the size of the array at run time, it's
possible to fudge it by doing the array indexing math yourself, but
you'd have to stretch quite a bit to come up with an example where
it's useful:
void blah(char *token, int width)
{
printf("token: %c\n", token[width * 2 + 1]);
// token[2][1] -- that's the math the compiler would normally do
}
int main()
{
char token[4][3];
token[2][1] = 'c';
blah((char *)token, 3); // send it the width of the array
return 0;
}
On 12/1/05, Yorch <[EMAIL PROTECTED]> wrote:
> You can define it this way:
>
> void blah(char **token);
>
> this way you won't need to use the size and you can use that pointer
> like a 2D array.
>
> On 11/30/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > Gah, I am not surprised I figured out the problem 5 minutes I send it to the
> > list.
> >
> > Though, to create some discussion on the list, I will ask this:
> >
> > Why cannot we define like so:
> > void blah(char token[][])
> > but:
> > void blah(char token[][size])?
> >
> > Enlighten me! :D
> >
> >
> >
> > Quoting [EMAIL PROTECTED]:
> >
> > >
> > >
> > > So, I am trying to pass a 2D char variable to a function and then do some
> > > stuff
> > > with it. However, I am receiving this error and I am not quite sure why:
> > >
> > > "arithmetic on pointer to an incomplete type"
> > >
> > > Poking around the internet hasn't lead me to anywhere interesting. I
> > > thought
> > > it
> > > was just my compiler on the linux box so I wrote a test program in
> > > dev-c++ so
> > > we can see if that was so. This is written and is compiled in C:
> > >
> > > void blah(char token[][]);
> > >
> > > int main()
> > > {
> > > char token[1][1];
> > >
> > > token[0][0] = 'c';
> > >
> > > blah(token);
> > >
> > > return 0;
> > > }
> > >
> > > void blah(char token[][])
> > > {
> > > printf("token: %c\n", token[0][0]);
> > > }
> > >
> > > It generates the same error.
> > >
> > > I am assuming, as usual, that it is something obvious and after spending
> > > hours
> > > (a good 4 hours straight) smashing my keyboard my eyes have gone out of
> > > control!
> > >
> > > Thank you!
> > >
> > >
> > > ----------------------------------------------------------------
> > > This message was sent using IMP, the Internet Messaging Program.
> > >
> >
> >
> >
> >
> > ----------------------------------------------------------------
> > This message was sent using IMP, the Internet Messaging Program.
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