[ns] mac-802_11.cc -> op

[Syed Faraz Hasan]

Hi NS Users,

I am trying to follow the mac-802_11.cc file in the NS2. I notice "->" 
operators used on several ocassions. Can somebody tell me what -> means in C++ 
(or in the file). For instance,

ap_list->ap_id=num; what does this mean?

There are more examples like:

temp->next->ap_power= power; etc. Any help shall be highly appreciated.

Thanks for your help in advance.

Faraz