Linked List and Nodes

This is a discussion on Linked List and Nodes within the C++ Programming forums, part of the General Programming Boards category; linked list class Code: class LinkedList { public: LinkedList(); // constructor ~LinkedList(); //destructor private: Node * headPtr; //wont let me ...

  1. #1
    Registered User
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    Jul 2004
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    Linked List and Nodes

    linked list class
    Code:
    class LinkedList {
     public:
    
            LinkedList(); // constructor
            ~LinkedList(); //destructor
     private:
            Node * headPtr; //wont let me do this why ???
    };
    node class
    Code:
    class Node {
     public:
            Node();
            ~Node(); //destructor
            Node* nextPtr;
            int item;
    };
    im trying to make a linked list. not sure if this is the correct way.
    basically i have a headPtr that points to the head of hte list. But i cant seem to define it in LInkedlist.h.
    I want to define it there because all the funcitons in LinkedList.cpp need to modify/read the items in the linked list..

    not too sure how to do this.. if anyone could help thanks heaps

  2. #2
    Registered User hk_mp5kpdw's Avatar
    Join Date
    Jan 2002
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    Northern Virginia/Washington DC Metropolitan Area
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    3,802
    Your LinkedList class needs to know what a Node is. Use a #include to include Node.H (or whatever you are calling it) in LinkedList.H and it should work.
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  3. #3
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    or u can define 'class node' at first then 'class linkedlist' .

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