*you can see in test your c skills yeshwant kanetkar * On Tue, Mar 29, 2011 at 2:05 AM, hammett <[email protected]> wrote:
> Not sure what you mean by class memory. Are you trying to distinguish > between class vs instances? If so, yes, I believe the vtable should be > per class, since the this pointer is probably the first one to be > pushed in non-static members call, it wouldnt make sense to have a > separated copy for each instance. I may be wrong here, though... > > On Mon, Mar 28, 2011 at 1:31 PM, Amit Basak <[email protected]> wrote: > > Theoretically, the vtable conatins pointer to each virtual function of > the > > class. > > Each object of this class contains a pointer called vptr to this virtual > > table. > > But will the space occupied by the v-table be part of the memory occupied > by > > the class? > > If the memory needed by v-table is part of class, then the class memory > size > > will be increased by 4n, where n is the number of virtual functions in > the > > class and the machine is 32 bit. > > Please correct me if I am wrong. > > Would appreciate if someone clarifies if the vtable is created in class > > memory or in any other memory space. > > -- > > Thanks, > > Amit Kumar Basak > > > > On Tue, Mar 29, 2011 at 1:47 AM, hammett <[email protected]> wrote: > >> > >> Off the top of my head, virtual functions are implemented through > >> v-tables http://en.wikipedia.org/wiki/Virtual_table > >> The size should be the size of a native pointer (4 bytes in 32 > >> machines) but I could be wrong. > >> > >> > >> On Mon, Mar 28, 2011 at 11:37 AM, himanshu kansal > >> <[email protected]> wrote: > >> > can u gv any link for reference...??? > >> > > >> > On Sat, Mar 26, 2011 at 12:29 PM, D.N.Vishwakarma@IITR > >> > <[email protected]> > >> > wrote: > >> >> > >> >> there is vtable known as virtual table which contains addresses of > >> >> virtual > >> >> functions . > >> >> And there is vptr a pointer that points to vtable of that class space > >> >> occupied by class having virtual function wil be equal to space > >> >> occupied by > >> >> a pointer * number of virtual functions .. > >> >> I think this if there is any correction please let me know... > >> >> > >> >> On Sat, Mar 26, 2011 at 12:00 PM, himanshu kansal > >> >> <[email protected]> wrote: > >> >>> > >> >>> wht is the space occupied by a class in c++ whn it contains a > virtual > >> >>> fn..... > >> >>> How are the virtual fn implemented internally by c++....... > >> >>> > >> >>> -- > >> >>> You received this message because you are subscribed to the Google > >> >>> Groups > >> >>> "Algorithm Geeks" group. > >> >>> To post to this group, send email to [email protected]. > >> >>> To unsubscribe from this group, send email to > >> >>> [email protected]. > >> >>> For more options, visit this group at > >> >>> http://groups.google.com/group/algogeeks?hl=en. > >> >>> > >> >> > >> >> > >> >> > >> >> -- > >> >> With Regards > >> >> Deoki Nandan Vishwakarma > >> >> IITR MCA > >> >> Mathematics Department > >> >> > >> >> -- > >> >> You received this message because you are subscribed to the Google > >> >> Groups > >> >> "Algorithm Geeks" group. > >> >> To post to this group, send email to [email protected]. > >> >> To unsubscribe from this group, send email to > >> >> [email protected]. > >> >> 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 [email protected]. > >> > To unsubscribe from this group, send email to > >> > [email protected]. > >> > For more options, visit this group at > >> > http://groups.google.com/group/algogeeks?hl=en. > >> > > >> > >> > >> > >> -- > >> Cheers, > >> hammett > >> http://hammett.castleproject.org/ > >> > >> -- > >> You received this message because you are subscribed to the Google > Groups > >> "Algorithm Geeks" group. > >> To post to this group, send email to [email protected]. > >> To unsubscribe from this group, send email to > >> [email protected]. > >> For more options, visit this group at > >> http://groups.google.com/group/algogeeks?hl=en. > >> > > > > > > > > > > > > > > > > -- > Cheers, > hammett > http://hammett.castleproject.org/ > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > > -- **With Regards Deoki Nandan Vishwakarma IITR MCA Mathematics Department* * -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
