Size of an empty class.

[Guest]

This was an interview question: The size of an empty class is 1 byte. Why?
Should it not be 4 bytes? Because an invisible pointer "this" is part of
every class?

 

[Jeff Partch]

This was an interview question: The size of an empty class is 1 byte. Why?
Should it not be 4 bytes? Because an invisible pointer "this" is part of
every class?

The this pointer is not part of the class it is the address of the class
instance. The sizeof an empty object is 1 so that each instance will have a
unique address.

 

[Bruno van Dooren]

This was an interview question: The size of an empty class is 1 byte. Why?

Should it not be 4 bytes? Because an invisible pointer "this" is part of
every class?

There was an extensive discussion about this topic last month in the thread
'Question about sizeof a class.'
google archive:
http://groups.google.be/group/micro...sizeof+a+class.&rnum=1&hl=nl#3c74822ed72091bc

--

Kind regards,
Bruno van Dooren
(e-mail address removed)
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