«

int main()
{
int normal[2][3];

int (&on_the_heap)[2][3] = *new int[2][3];
}


My operator precendence may be wrong in the above.


-JKop

JKop wrote:
> int (&on_the_heap)[2][3] = *new int[2][3];

There is no language construct for dynamically allocating
multidimensional arrays. See the comp.lang.c FAQ question 6.16 and
related questions:

http://www.eskimo.com/~scs/C-faq/q6.16.html

(Substitute new for malloc appropriately)
--
Derrick Coetzee
I grant this newsgroup posting into the public domain. I disclaim all
express or implied warranty and all liability. I am not a professional.

Derrick Coetzee posted:

> JKop wrote:
>> int (&on_the_heap)[2][3] = *new int[2][3];
>
> There is no language construct for dynamically allocating
> multidimensional arrays. See the comp.lang.c FAQ question
6.16 and
> related questions:
>
> http://www.eskimo.com/~scs/C-faq/q6.16.html
>
> (Substitute new for malloc appropriately)

I've done it before. I used a reference or a pointer to a
multidimensional array I believe.

Something along the lines of:

int k[8];

int (&r)[2] = k;

r[0][1] = 1;
r[0][2] = 2;
r[0][3] = 3;
r[0][4] = 4;
r[1][1] = 5;
r[1][2] = 6;

//and so on


-JKop

JKop wrote:

> int main()
> {
> int normal[2][3];
>
> int (&on_the_heap)[2][3] = *new int[2][3];
> }
>
>
> My operator precendence may be wrong in the above.



int (*p)[3]=new int[2][3];

// ...


delete[] p;






Regards,

Ioannis Vranos

http://www23.brinkster.com/noicys

Derrick Coetzee wrote:

> JKop wrote:
>
>> int (&on_the_heap)[2][3] = *new int[2][3];
>
>
> There is no language construct for dynamically allocating
> multidimensional arrays.


What?





> See the comp.lang.c FAQ question 6.16 and
> related questions:
>
> http://www.eskimo.com/~scs/C-faq/q6.16.html


It is C++ here, not C. But I just checked that FAQ. Who wrote that CRAP?

Even the casts it has in malloc are not needed in C!


In any case in C it can be done:


#include <stdlib.h>

/* ... */

int (*p)[3]=malloc(2*sizeof(*p));

/* ... */

free(p);






Regards,

Ioannis Vranos

http://www23.brinkster.com/noicys

JKop <> wrote in news:IXl_c.26563$:

> Derrick Coetzee posted:
>
>> JKop wrote:
>>> int (&on_the_heap)[2][3] = *new int[2][3];
>>
>> There is no language construct for dynamically allocating
>> multidimensional arrays. See the comp.lang.c FAQ question
> 6.16 and
>> related questions:
>>
>> http://www.eskimo.com/~scs/C-faq/q6.16.html
>>
>> (Substitute new for malloc appropriately)
>
> I've done it before. I used a reference or a pointer to a
> multidimensional array I believe.
>
> Something along the lines of:
>
> int k[8];
>
> int (&r)[2] = k;
>
> r[0][1] = 1;
> r[0][2] = 2;
> r[0][3] = 3;
> r[0][4] = 4;
> r[1][1] = 5;
> r[1][2] = 6;
>
> //and so on

And what does this have to do with dynamically allocating
multidimensional arrays?

Andre Kostur posted:

> JKop <> wrote in news:IXl_c.26563$Z14.8409
@news.indigo.ie:
>
>> Derrick Coetzee posted:
>>
>>> JKop wrote:
>>>> int (&on_the_heap)[2][3] = *new int[2][3];
>>>
>>> There is no language construct for dynamically
allocating
>>> multidimensional arrays. See the comp.lang.c FAQ
question 6.16 and
>>> related questions:
>>>
>>> http://www.eskimo.com/~scs/C-faq/q6.16.html
>>>
>>> (Substitute new for malloc appropriately)
>>
>> I've done it before. I used a reference or a pointer to
a
>> multidimensional array I believe.
>>
>> Something along the lines of:
>>
>> int k[8];
>>
>> int (&r)[2] = k;
>>
>> r[0][1] = 1;
>> r[0][2] = 2;
>> r[0][3] = 3;
>> r[0][4] = 4;
>> r[1][1] = 5;
>> r[1][2] = 6;
>>
>> //and so on
>
> And what does this have to do with dynamically allocating
> multidimensional arrays?


Do I have to do EVERYTHING myself?! Just make k dynamically
allocated:

int& k = *new int[8];

Ioannis Vranos wrote:

> It is C++ here, not C. But I just checked that FAQ. Who wrote that CRAP?
>
> Even the casts it has in malloc are not needed in C!
>
>
> In any case in C it can be done:
>
>
> #include <stdlib.h>
>
> /* ... */
>
> int (*p)[3]=malloc(2*sizeof(*p));
>
> /* ... */
>
> free(p);



The above implies that one dimension must be known.






Regards,

Ioannis Vranos

http://www23.brinkster.com/noicys

Ioannis Vranos <> wrote:
> Derrick Coetzee wrote:
>
> > JKop wrote:
> >
> >> int (&on_the_heap)[2][3] = *new int[2][3];
> >
> > There is no language construct for dynamically allocating
> > multidimensional arrays.

Crap, as demonstrated by JKop's example

>
> > See the comp.lang.c FAQ question 6.16 and
> > related questions:
> >
> > http://www.eskimo.com/~scs/C-faq/q6.16.html
>
> It is C++ here, not C. But I just checked that FAQ. Who wrote that CRAP?
>
> Even the casts it has in malloc are not needed in C!

That's been fixed in the text version of the faq (nobody bothers
to update the HTML version).