Need help with dinamic lists

[Dijkstra30]

until now my dinamic lists were defined as follows:

typedef struct obj {
int info;
struct obj *left, *right;
};
the pointers *left, *right point to objects of the same type.
Now... I want to create a class of these kind of objects

Let's say this class look like this (if i'm not mistaken)

class Obj
{
int inf;
Obj *left, *right;
};

With this declaration I have problems accesing the next element in list;
I also have trouble with redefinig operators.

 

[cpjust]

Without seeing how you're trying to use it or what errors you're getting, my first guess is that you're trying to use it just like a struct.
By default, all data in a struct is public, but in a class all data is private by default.
Try this:

class Obj
{
public:
  int inf;
  Obj *left, *right;
};

Although this is a very BAD way to implement it since all your data is exposed.
A better way would be something like this:

class List
{
public:
  List();   // Constructor.
  ~List();  // Destructor.

  void Insert( int value );  // Insert a new List node after this one.
  void Remove();  // Remove this List node.

  int   operator*();  // Get the data from this List node.

  List& operator++();  // Move to the next List node.
  List& operator++( int );

  List& operator--();  // Move to the previous List node.
  List& operator--( int );

private:
  int    m_Data;
  List*  m_Previous;
  List*  m_Next;
};

and once you do that you might as well just use the STL list template which does it a lot better than I can do by myself.

 

[ArkM]

It's the C++ language, folks.
You may add all members (ctor, dtor etc) to struct directly. A structure is a class with all public members in C++...