creating static array

[Rahul Joshi]

Hi,

I want to create a static array whose size is also a const
member of the class. Something like:

// A.h
class A {
private:
static int size = 0;
static int array[size];
};

Then I need to define the static array in A.cpp like:

int A::array[A::size];

However, the compiler complains that A::size is a private
and cannot be accessed. So how can I define such a static
array without making the size of the array public ?

Thanks,
Rahul

[Andrey Tarasevich]

Re: creating static array

Rahul Joshi wrote:[color=blue]
> ...
> I want to create a static array whose size is also a const
> member of the class. Something like:
>
> // A.h
> class A {
> private:
> static int size = 0;
> static int array[size];
> };
>
> Then I need to define the static array in A.cpp like:
>
> int A::array[A::size];
>
> However, the compiler complains that A::size is a private
> and cannot be accessed. So how can I define such a static
> array without making the size of the array public ?
> ...[/color]

Aside from missing 'const' specifier and array size being zero, I don't
see any problems with this code. (Please, always post _real_ code, i.e.
the code you are actually trying to compile.)

The error message is most likely caused by a bug in your compiler.
According to 11/5 access control is not supposed to restrict access to
'A::size' in the above member definition.

--
Best regards,
Andrey Tarasevich
Brainbench C and C++ Programming MVP

[xiaoqing Visson]

Re: creating static array

i think you just make a mistake when you declare
static int array[size] ;
because std c++ doesn't support "dynamic" declare , you know size is not a
const number, so this will generate a mistake. and i compile it in dev-c++
4.9.8.0 with winme,
it just appear "4 D:\source code\stl_c++\st atictest.h
size of member `array' is not constant"
so if you want to achive this ,i think the best way is to use stl: vector.


"Rahul Joshi" <rujoshi@studen ts.uiuc.edu>
??????:Pine.GSO .4.31.030717191 8510.7422-100000@ux7.cso. uiuc.edu...[color=blue]
> Hi,
>
> I want to create a static array whose size is also a const
> member of the class. Something like:
>
> // A.h
> class A {
> private:
> static int size = 0;
> static int array[size];
> };
>[/color]
[color=blue]
> Then I need to define the static array in A.cpp like:
>
> int A::array[A::size];
>
> However, the compiler complains that A::size is a private
> and cannot be accessed. So how can I define such a static
> array without making the size of the array public ?
>
> Thanks,
> Rahul
>[/color]

[Rahul Joshi]

Re: creating static array



On Thu, 17 Jul 2003, Andrey Tarasevich wrote:
[color=blue]
> Rahul Joshi wrote:[color=green]
> > ...
> > I want to create a static array whose size is also a const
> > member of the class. Something like:
> >
> > // A.h
> > class A {
> > private:
> > static int size = 0;
> > static int array[size];
> > };
> >
> > Then I need to define the static array in A.cpp like:
> >
> > int A::array[A::size];
> >
> > However, the compiler complains that A::size is a private
> > and cannot be accessed. So how can I define such a static
> > array without making the size of the array public ?
> > ...[/color]
>
> Aside from missing 'const' specifier and array size being zero, I don't
> see any problems with this code. (Please, always post _real_ code, i.e.
> the code you are actually trying to compile.)
>
> The error message is most likely caused by a bug in your compiler.
> According to 11/5 access control is not supposed to restrict access to
> 'A::size' in the above member definition.
>
> --
> Best regards,
> Andrey Tarasevich
> Brainbench C and C++ Programming MVP
>
>[/color]

Sorry. That was some code I made up. I was trying to define a static array
of pointers-to-member functions of the class, and the size of this array
is a static const int. Apparently, my syntax was wrong. As suggested in
C++ FAQ, I used a typedef for the pointer-to-member type, and it compiled
correctly. Thanks.

Rahul