Access a struct elements from...

Well, I decided to try some FAQ tutorials I hadent been able to understand before. Namely, linked lists and binary trees. I'm on linked lists at the moment, I read through it, and decided I wanted to make a wrapper class for my list, so I could acess list elements from within a class.

But, I've never used structs... Ever. Only classes. So, I'm quite confused as to how to access a struct element from inside a wrapper class:

Code:

#define Next      4
#define Prev       8
#define Previous  8
 typedef struct element *Wha;

 struct Wha {
  Wha prev;
  Wha next;
  int clams;
 };

 class WhaWrapper {
  private:
   Wha Confusing;

  public:
   WhaWrapper();
   WhaWrapper(int I) {;} //I want to set the int clams from here in the Wha class.
 };

Thanks for your help!

If you know how to access members of a class, then its no different with a struct. Essentially, a class is exactly the same as a struct, with one difference; a struct defaults all members public, wheras a class defaults all members private. From a style point of view, most programmers only use a struct when there are no member functions, and all data members are public (mimic'ing the use of a struct in 'C').

If you're creating a linked list, a node in a linked list must at least point to the node which is next and/or previous to itself. but at the moment, your data structure doesn't contain any pointers at all.
I suggest you get to grips with a basic singly-linked list (the simplest kind of linked list, with only one pointer in each node) before creating any wrapper classes and other fancy stuff on top of that.

Ah, I see. I misread, confused Element with element in the tutorial. Heh, I didint realize structs were simplfidied classes, thanks.

Originally Posted by Blackroot

Ah, I see. I misread, confused Element with element in the tutorial. Heh, I didint realize structs were simplfidied classes, thanks.

Almost, except that structs are not simplified from classes in any way at all. everything that you can do with a class, can be done in a struct, and vice versa. the only difference is the default access rights. which is why use of class vs struct is purely a style issue. The reason why struct is commonly used for structures which contain only public data members is more to do with the historical connection to 'C'.