Define and array initialisation

[Michael]

Hi all,

I have got a simple question about the
#define command: Can I use it for array
initialisation?

E.g.

#define ARRAYINIT { {0, 1}, {2,3} }

....
int main ( void )
{
int somestuff[][] = ARRAYINIT;
...
}

Thanks,
Michael

[Alex Fraser]

Re: Define and array initialisation

"Michael" <mic457@gmx.net > wrote in message
news:ccgael$har $1@rzcomm2.rz.t u-bs.de...[color=blue]
> I have got a simple question about the
> #define command: Can I use it for array
> initialisation?
>
> E.g.
>
> #define ARRAYINIT { {0, 1}, {2,3} }
>
> ...
> int main ( void )
> {
> int somestuff[][] = ARRAYINIT;
> ...
> }[/color]

Yep. After the preprocessing phase the source will read:

....
int main ( void )
{
int somestuff[][] = { {0, 1}, {2,3} };
...
}

Alex

[Michael]

Re: Define and array initialisation

Alex Fraser wrote:
[color=blue]
> Yep. After the preprocessing phase the source will read:
>
> ...
> int main ( void )
> {
> int somestuff[][] = { {0, 1}, {2,3} };
> ...
> }
>
> Alex[/color]

Hi Alex,

thanks for the quick response.
Regards
Michael

[Emmanuel Delahaye]

Re: Define and array initialisation

In 'comp.lang.c', "Alex Fraser" <me@privacy.net > wrote:
[color=blue]
> Yep. After the preprocessing phase the source will read:
>
> ...
> int main ( void )
> {
> int somestuff[][] = { {0, 1}, {2,3} };
> ...
> }[/color]

That is not C.

int somestuff[][2] = { {0, 1}, {2,3} };

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[Emmanuel Delahaye]

Re: Define and array initialisation

In 'comp.lang.c', Michael <mic457@gmx.net > wrote:
[color=blue]
> I have got a simple question about the
> #define command: Can I use it for array
> initialisation?
>
> #define ARRAYINIT { {0, 1}, {2,3} }
> ...
> int main ( void )
> {
> int somestuff[][] = ARRAYINIT;
> ...
> }[/color]

Yes, but the dimensions of the array should be added

int somestuff[2][2] = ARRAYINIT;

only the lefmost dimension can be ommited :

int somestuff[][2] = ARRAYINIT;

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C-reference: http://www.dinkumware.com/manuals/reader.aspx?lib=c99
FAQ de f.c.l.c : http://www.isty-info.uvsq.fr/~rumeau/fclc/

[Michael]

Define and array initialisation - Yx1 Array

> Yes, but the dimensions of the array should be added[color=blue]
>
> int somestuff[2][2] = ARRAYINIT;
>
> only the lefmost dimension can be ommited :
>
> int somestuff[][2] = ARRAYINIT;[/color]

Hi,

yeah, my compiler already complaint about that. But I got
an other question. My compiler complains about an Yx1 array
like:

int somestuff[6][1] = { {1}, {1}, {1}, {1}, {1}, {1} };

I know, I can do it with one dimension, but due the programm
structure I would prefer to realize the above array.
Is the a chance?
Thanks,
Michael

[Emmanuel Delahaye]

Re: Define and array initialisation - Yx1 Array

In 'comp.lang.c', Michael <mic457@gmx.net > wrote:
[color=blue]
> My compiler complains about an Yx1 array
> like:
>
> int somestuff[6][1] = { {1}, {1}, {1}, {1}, {1}, {1} };
>
> I know, I can do it with one dimension, but due the programm
> structure I would prefer to realize the above array.[/color]

or

int somestuff[][1] = { {1}, {1}, {1}, {1}, {1}, {1} };

Well, I don't see what does your compiler complain about. Sounds good to me.
Must be something else.

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[Michael]

Re: Define and array initialisation - Yx1 Array

Emmanuel Delahaye wrote:
[...][color=blue]
> Well, I don't see what does your compiler complain about. Sounds good to me.
> Must be something else.
>[/color]
Exactly. You are right it was something else.
Thanks again ....
Michael