Virtual base class

[ak16]

Hello,

what is the size of object of Class child in following case?

class Parent
{

};
class Child : virtual public Parent
{

};

[cire]

#include <iostream>

class Parent
{

};
class Child : virtual public Parent
{

};

int main()
{
    std::cout << sizeof(Child) << '\n' ;
}

It is what it is.

[ak16]

thanx cire for reply.

yes you are right.

size become 4 byte(depend on compiler).

right?

[cire]

Yes.

You might find some interesting reading here:
http://stackoverflow.com/questions/2038717/object-size-with-virtual

[ak16]

yes its because Child class contain one vptr. because its virtual base class inheritance.

So, what that vptr stored?
means whose address it store?

address of VTable for Parent class?

[ak16]

Hi cire,

waiting for reply...