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copied!<p>I see three point analysis for the above question</p> <h2>a. Virtual Inheritance <br/></h2> <p>"Virtual inheritance is a mechanism whereby a class specifies that it is willing to share the state of its virtual base class. Under virtual inheritance, only one, shared base-class subobject is inherited for a given virtual base regardless of how many times the class occurs as a virtual base within the derivation hierarchy. The shared base-class subobject is called a virtual base class." ... From Lippman</p> <p>Virtual inheritance only avoids duplicate sub-objects inherited from multiple inheritance. But this does not indicate in any way that the base class objects will not be sub-objects. On the contrary, the sub-object (atleast one copy would be present - I mean would be included in sizeof() operation) even during the virtual inheritance.</p> <h2>b. virtual function <br/></h2> <p>Virtual function is for dynamic binding of member functions of objects involved in hierarchy. So even this does not have any significance towards sub-object arrangements.</p> <h2>c. Implementation of the sub-objects <br/></h2> <p>This is totally compiler dependent, and for all reasons would be very difficult to determine - in its implementation. However, we can confirm that the sizeof() of the object would include the size of the base class (sub) objects also - and we can visualize them as having the base class object embedded in them. </p> <p>Each object of the inherited function will definitely contain space for the sub-objects. </p> <p>HTH </p>

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