empty class

[dost]

can any budy tell me
why the size of the empty class object is 1


thank you
kapil kaushik

 

[Rolf Magnus]

can any budy tell me
why the size of the empty class object is 1

Because in C++, every object has a unique address. Now consider what happens
if you make an array of zero-sized objects.

 

[Keshav]

Just imagine how bad a programmers life will be if size of empty class
is 0. U created a many objects of an empty classes and all are having
same address!!!

Link to wht stroustrup says...
http://public.research.att.com/~bs/bs_faq2.html#sizeof-empty

~K2G

 

[Daniel T.]

can any budy tell me
why the size of the empty class object is 1

Objects exist, therefore they take up space. sizeof tells you how big
they are. If an object were to have sizeof == 0 then it would not exist.

 

[dost]

if the size of empty class object is "1"....and if we declare
some..variable..in it suppose int
then its..size change....only the size of the variable will
matter...where the difault size gone
example
class empty { int a;}
its object size will be 2.....where the difault size gone
thanks

 

[Jack Klein]

can any budy tell me
why the size of the empty class object is 1

The size of an empty class object is not necessarily 1. It is merely
required to be greater than 0.

 

[Daniel T.]

if the size of empty class object is "1"....and if we declare
some..variable..in it suppose int
then its..size change....only the size of the variable will
matter...where the difault size gone
example
class empty { int a;}
its object size will be 2.....where the difault size gone
thanks

Who says there ever was a default size? The size of an object is either
1 or the sum of the sizeof each contained element (possibly plus some
padding,) whichever is greater.

 

[Jaspreet]

The size of an empty class object is not necessarily 1. It is merely
required to be greater than 0.

--

Size of an empty class object is >= 1. However, an empty base-class
component of a derived classes can be size 0.