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]

"Michael" <mi****@gmx.net> wrote in message
news:cc**********@rzcomm2.rz.tu-bs.de...

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;
...
}

Yep. After the preprocessing phase the source will read:

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

Alex

[Michael]

Alex Fraser wrote:

Yep. After the preprocessing phase the source will read:

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

Alex

Hi Alex,

thanks for the quick response.
Regards
Michael

[Emmanuel Delahaye]

In 'comp.lang.c', "Alex Fraser" <[e-mail]> wrote:

Yep. After the preprocessing phase the source will read:

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

That is not C.

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

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[Emmanuel Delahaye]

In 'comp.lang.c', Michael <mi****@gmx.net> wrote:

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;
...
}

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]

> 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;

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]

In 'comp.lang.c', Michael <mi****@gmx.net> wrote:

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.

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]

Emmanuel Delahaye wrote:
[...]

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

Exactly. You are right it was something else.
Thanks again ....
Michael