@abc abc
4th class= two ints from X and Y classes + one int from base class( as
this class is shared ) + 2 virtual pointers of X and Y classes.
On Jul 3, 2:24 pm, abc abc <may.i.answ...@gmail.com> wrote:
> In the second case , the size of vptr will be added to each and every object
> .
> 1st class = one int :4
> 2nd class = one int +one int from base + vptr =12
> 3rd class = one int + one int from base + vptr =12
> 4th class =one int from each base class + one int from each of the grand
> parent +one vptr =20
>
> On Sun, Jul 3, 2011 at 2:43 PM, himanshu kansal <himanshukansal...@gmail.com
>
>
>
>
>
>
>
> > wrote:
> > class Base
> > {
> > public:
> > int a;
> > };
>
> > class X: public Base
> > {
> > public:
> > int x;
> > };
>
> > class Y: public Base
> > {
> > public:
> > int y;
> > };
>
> > class Z:public X,public Y
> > {
> > };
>
> > int main()
> > {cout<<sizeof(Base)<<endl;
> > cout << sizeof(X) <<endl;
> > cout << sizeof(Y) <<endl;
> > cout << sizeof(Z) <<endl;
> > }
> > o/p is 4
> > 8
> > 8
> > 16...
> > which is absolutely fine.....
>
> > but the problem arises here....
> > class Base
> > {
> > public:
> > int a;
> > };
>
> > class X:virtual public Base
> > {
> > public:
> > int x;
> > };
>
> > class Y:virtual public Base
> > {
> > public:
> > int y;
> > };
>
> > class Z:public X,public Y
> > {
> > };
>
> > int main()
> > {cout<<sizeof(Base)<<endl;
> > cout << sizeof(X) <<endl;
> > cout << sizeof(Y) <<endl;
> > cout << sizeof(Z) <<endl;
> > }
>
> > o/p is 4
> > 12
> > 12
> > 20
> > why the size is 12 and 20 for x and Z....does this is because that
> > some sort of VPTR IS maintained in the class....if yes then then what
> > does that points to....
>
> > PS:HERE.....i am talking about virtual inheritance....NOT ABOUT
> > "VIRTUAL FUNCTIONS"...
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "Algorithm Geeks" group.
> > To post to this group, send email to algogeeks@googlegroups.com.
> > To unsubscribe from this group, send email to
> > algogeeks+unsubscr...@googlegroups.com.
> > For more options, visit this group at
> >http://groups.google.com/group/algogeeks?hl=en.
--
You received this message because you are subscribed to the Google Groups
"Algorithm Geeks" group.
To post to this group, send email to algogeeks@googlegroups.com.
To unsubscribe from this group, send email to
algogeeks+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/algogeeks?hl=en.
