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Hello
Iam Niranjan... i have one small doubt.

void main()
{
int size;
size = sizeof(int *);
printf("\n size of int *------>%x"size);
size = sizeof(char *);
printf("\n size of char *------>%x"size);
size = sizeof(float *);
printf("\n size of float *------>%x"size);
}
here i got the same size for all three.
when all three taking the same size... why we need different type of
pointers..
plz clarify any one..
Thanking you
Niranjan

Comp.Lang.c said:

> Hello
> Iam Niranjan... i have one small doubt.
>
> void main()

Lesson 1: main returns int, not void.

When you have absorbed that lesson, let us know.

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999
http://www.cpax.org.uk
email: rjh at above domain (but drop the www, obviously)

whats the relation between main return type & pointers size...?

Comp.Lang.c said:

> whats the relation between main return type & pointers size...?

None whatsoever, because main always returns int.

When you understand that, we can move on to the next error in your example
program. There doesn't seem to be any point in teaching you new things
until you've understood the old things correctly. It would be like building
a house on sand.

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999
http://www.cpax.org.uk
email: rjh at above domain (but drop the www, obviously)

"Comp.Lang.c" <> writes:
> Iam Niranjan... i have one small doubt.

I suggest you pick a name for yourself other than "Comp.Lang.c".
That's the name of the newsgroup; referring to yourself by the same
name is bound to cause confusion. (Using your own real name is
usually best, but some people choose to use pseudonyms.)

> void main()

int main(void)

> {
> int size;
> size = sizeof(int *);
> printf("\n size of int *------>%x"size);
> size = sizeof(char *);
> printf("\n size of char *------>%x"size);
> size = sizeof(float *);
> printf("\n size of float *------>%x"size);
> }
> here i got the same size for all three.
> when all three taking the same size... why we need different type of
> pointers..

Because they point to different types.

--
Keith Thompson (The_Other_Keith) kst- <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.

they have fixed in size because pointer do not hold the variable's
itself they only hold the adresses.But it do not mean that one type of
pointer can hold all the types.we have to tell the compiler "this
pointer is use for this type of variable".the reason is c uses STRONGLY
TYPE CHECKING.we can't change variables types(of course pointers are
variavles too) during the run time and compile time.

Thanq Mr Keith Thompson.
its very very nice meeting you.
Thanking you, for your great Help.
Niranjan Podduturi.
+919849238297

Hello Sir,
I know ...
void main returns int.
Iam niranjan podduturi.
Iam from Hyderabad/India
Thanking you Sir.
Niranjan Podduturi

Comp.Lang.c said:

> Hello Sir,
> I know ...
> void main returns int.

No, main returns int.

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999
http://www.cpax.org.uk
email: rjh at above domain (but drop the www, obviously)

Typhonike wrote:
>
> they have fixed in size because pointer do not hold the variable's
> itself they only hold the adresses.

No.

sizeof(int *), sizeof(char *), and sizeof(float *)
are all equal on OP's implementation through sheer coincidence.

The relative sizes of those types of pointers
is unspecified by the rules of the C programming language.

--
pete