--- Kapil <[EMAIL PROTECTED]> wrote:
>
> >
> >
> > Hi Sasi,
> > I have a turbo C compiler (16 bit)..
> >
> > I have tried both the ways and I am getting the
> same
> > result both the ways... The result is 3 due to 16
> > bit...
> > 2 for int
> > 1 for char
> >
> > Please recheck it ...
> >
> > Regards
> > Ashwin Mittal.
>
> You are working on a pathetic 8 bit OS which assumes
> the processor to be
> 8088 only. Hence the memory allocation is in
> multiples of 1 byte so in dos
> struct abc {
> int a;
> char b;
> };
> will yield a sizeof value 3 bytes
>
> however on 32 bit OS es like Linux / windows
> nt/2000/xp you will get
> value as 8 bytes only.
>
hey you have modified my answer..................
The question which is being posted goes like this
>
> > From: Himanshu Arora <[EMAIL PROTECTED]>
> > Subject: What's wrong with this?
> >
> >
> > Look at the following three codes
> >
> > struct abc{
> > int a;
> > }
> >
> > int main()
> > {
> > abc X;
> > cout<<sizeof(X);
> > }
> > It gives me output of 4 as expected.
> >
> > Now,
> >
> > struct abc{
> > char a;
> > }
> > int main()
> > {
> > abc X;
> > cout<<sizeof(X);
> > }
> >
> > This gives me 1 as output.
> > Now if i try
> >
> > struct abc{
> > int a;
> > char b;
> > }
> > int main()
> > {
> > abc X;
> > cout<<sizeof(X);
> > }
> > why is it giving me output as 8 ??
> > I m confused .I've tried both gcc and borland
> > compiler,the output is same.
> > Pls clear my concepts.
> > Thnx
> > Himanshu
> >
> Himanshu,
>
> This is the padding concept. Whenever the structure
> is
> instantiated in the memory, the memory allocation
> takes place based upon its elements' arrangement. If
> the default size of the element place first in the
> memory is larger and the default size of second(and
> so
> forth) elements are smaller then the system reserves
> the memory in the multiples of the first elements
> size(which is larger in size)
> In your example if you'll rerrange the code like
> following then you'll get the correct result:-
> struct abc{
> char b;
> int a;
> }
>
> regards,
> :-)Sash:-)
>
>
>Hi Sasi,
>I have a turbo C compiler (16 bit)..
>I have tried both the ways and I am getting the same
>result both the ways... The result is 3 due to 16
>bit...
>2 for int
>1 for char
>Please recheck it ...
>Regards
>Ashwin Mittal.
and even if you rearrange the code
like this
struct abc
{
char a,
int b
}
instead of
struct abc
{
int a,
char b
}
then in both the cases result is same......
even on gcc compiler ...the answer is 8.......
Okay Kapil.. I think you have got my point....
Ashwin Mittal.
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