why is size of empty class is 1 byte

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  • Ajay
    #1

    why is size of empty class is 1 byte

    Hello All, I have one question in mind...when you derive an empty class
    and see its size it comes 1 byte,can somebody tell me why.....Thanks in
    advance.
    Ajay

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    • Greg Comeau
      #2
      Re: why is size of empty class is 1 byte

      In article <1156232110.704 638.176480@75g2 000cwc.googlegr oups.com>,
      Ajay <ajay.kumarCS@g mail.comwrote:
      >Hello All, I have one question in mind...when you derive an empty class
      >and see its size it comes 1 byte,can somebody tell me why.....Thanks in
      >advance.
      Because zero sized objects are normally not allowed so it normally
      gets 1, though it could be more, it's implementation defined.
      When derived from, it's implementation defined as well whether
      or not it take up any space in the derived class since the
      derived class won't be zero sized and no user base members would be
      used since they don't exist.
      --
      Greg Comeau / 20 years of Comeauity! Intel Mac Port now in alpha!
      Comeau C/C++ ONLINE == http://www.comeaucomputing.com/tryitout
      World Class Compilers: Breathtaking C++, Amazing C99, Fabulous C90.
      Comeau C/C++ with Dinkumware's Libraries... Have you tried it?

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