hi
1.what will be the size of character pointer
2. what will be the size of a class which do not have private
datamember or member functions?
eg. class k{ };
3. do anybody have any pointers related output questions

On 2007-12-26 08:40:45 -0500, vich <sundaram.bhuvana@gmail.com> said:

> hi
> 1.what will be the size of character pointer

Have you tried to write a sample program to find out?

> 2. what will be the size of a class which do not have private
> datamember or member functions?
> eg. class k{ };

Same question as above.

> 3. do anybody have any pointers related output questions

Are you preparing for a job interview? Try googling "C++ FAQ".

--

-kira

On 2007-12-26 07:40:45 -0600, vich <sundaram.bhuvana@gmail.com> said:

> hi
> 1.what will be the size of character pointer

Implementation defined.

> 2. what will be the size of a class which do not have private
> datamember or member functions?
> eg. class k{ };

Implementation defined.

> 3. do anybody have any pointers related output questions

Not me.

-dr

vich wrote:
> hi
> 1.what will be the size of character pointer
sizeof (char*)

> 2. what will be the size of a class which do not have private
> datamember or member functions?

public/private/protected has NO real bearing on size.

> eg. class k{ };

sizeof(k) is at least one. All objects are at least 1 byte long.
It could be bigger. It depends on your implementation.

> 3. do anybody have any pointers related output questions

Could you rephrase that in English?

Kira Yamato wrote:
> On 2007-12-26 08:40:45 -0500, vich <sundaram.bhuvana@gmail.com> said:
>
>> hi
>> 1.what will be the size of character pointer
>
> Have you tried to write a sample program to find out?

That would tell him for his specific implementation, but it doesn't
give the real answer.

>

On Dec 26, 8:40 am, vich <sundaram.bhuv...@gmail.com> wrote:
> hi
> 1.what will be the size of character pointer

Depends on the machine. However, nobody cares.
Code should be transparent to the platform / architecture involved (8
bit, 32 bit, 64 bit, etc)

> 2. what will be the size of a class which do not have private
> datamember or member functions?

A class has no size. Its just a blueprint.

> eg. class k{ };
> 3. do anybody have any pointers related output questions

try the faq:
http://www.parashift.com/c++-faq-lit...d-objects.html

vich <sundaram.bhuvana@gmail.com> wrote:

> 1.what will be the size of character pointer

The same size as any other pointer. It's compiler dependent.

> 2. what will be the size of a class which do not have private
> datamember or member functions?
> eg. class k{ };

This is a special case.

class k { };
class y : k { };

'sizeof( k )' probably equals 1, which implies that all 'k' objects are
one byte, however 'sizeof( y )' probably also equals 1, so class 'k'
isn't adding anything to the size of derived objects...

So the answer to this question is that it is compiler and situation
dependent.

> 3. do anybody have any pointers related output questions

I don't understand the question.

Daniel T. wrote:
> vich <sundaram.bhuvana@gmail.com> wrote:
>
>> 1.what will be the size of character pointer
>
> The same size as any other pointer. It's compiler dependent.
>
>> 2. what will be the size of a class which do not have private
>> datamember or member functions?
>> eg. class k{ };
>
> This is a special case.
>
> class k { };
> class y : k { };
>
> 'sizeof( k )' probably equals 1, which implies that all 'k' objects are
> one byte, however 'sizeof( y )' probably also equals 1, so class 'k'
> isn't adding anything to the size of derived objects...
>
> So the answer to this question is that it is compiler and situation
> dependent.
>
The fact that sizeof(y) is also 1 doesn't change the fact that sizeof(k)
is one. It just goes to show that the size of a class is not
necessarily the sum of the sizes of it's subobjects.

On Dec 26 2007, 4:02 pm, Ron Natalie <r...@spamcop.net> wrote:
> vich wrote:
> > 2. what will be the size of a class which do not have private
> > datamember or member functions?

> public/private/protected has NO real bearing on size.

Unless the implementation decides otherwise. I don't know of
any which do, but I could very easily imagine an implementation
where:

class C1
{
public:
double d1 ;
char c1 ;
double d2 ;
char c2 ;
} ;

class C2
{
public:
double d1 ;
private:
char c1 ;
public:
double d2 ;
private:
char c2 ;
} ;

and sizeof( C1 ) == 32 but sizeof( C2 ) == 24. An
implementation is allowed to rearrange the order of variables if
there is an intervening access specifier.

--
James Kanze (GABI Software) email:james.kanze@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

On Dec 26 2007, 4:56 pm, "Daniel T." <danie...@earthlink.net> wrote:
> vich <sundaram.bhuv...@gmail.com> wrote:
> > 1.what will be the size of character pointer

> The same size as any other pointer. It's compiler dependent.

It's implementation dependent, but all pointers aren't
necessarily the same size. I've used machines where char* (and
void*, if void had existed back then) was larger than int*, and
on one of the most wide spread machines some years ago, function
pointers could have a different size than data pointers. (Back
when I last worked on a portable compiler, we considered four
different sizes for pointers: char pointers, other data
pointers, function pointers and label pointers---you can't
declare anything with the last type in C/C++, but they were used
by Fortran, and internally in the code generated for a switch.)

--
James Kanze (GABI Software) email:james.kanze@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34