binary search trees

This is a discussion on binary search trees within the C++ Programming forums, part of the General Programming Boards category; I have a template binary search tree and have to create 2 trees. I am not sure how it is ...

  1. #1
    Registered User
    Join Date
    Apr 2002
    Posts
    94

    Question binary search trees

    I have a template binary search tree and have to create 2 trees.
    I am not sure how it is done and how the BSTree class distinguishes between them.
    Code:
    template <class T>
    class BSTree
    {
    	public:
    		BSTree (){root=NULL; deleted=0;};
    		~BSTree (){clear(root);}
    
    		int isEmpty () const {return root==NULL;}
    		T retrieveData (T& data);
    		void insertData (const T& data);
    		void deleteData (const T& data);
    		void printBSTree ();
    
    	protected:
    		void clear (BTNode<T> *treeRoot);
    		void deleteHelper (BTNode<T> *&treeRoot, const T& data);
    		void insertHelper (BTNode<T> *&treeRoot, const T& data);
    		void printInOrder (BTNode<T> *treeRoot);
    		T retrieveHelper (BTNode<T> *treeRoot, T& data);
    		BTNode<T> *root;
    		int deleted;
    };
    
    //----------------------------------------
    
    class car
    {
    ....
    ....
    };
    
    //----------------------------------------
    
    class Bike
    {
    ....
    ....
    };
    Any help would be greatly appreciated.

    Cheers
    Sophie
    simple is always an understatement.....

  2. #2
    Registered User hk_mp5kpdw's Avatar
    Join Date
    Jan 2002
    Location
    Northern Virginia/Washington DC Metropolitan Area
    Posts
    3,806
    You want to know how to create different BSTree objects based on your car and Bike classes?
    Code:
    BSTree<car> carTree;
    BSTree<Bike> bikeTree;
    "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
    Registered User
    Join Date
    Apr 2002
    Posts
    94
    Hmmm...well I also have the following struct
    Code:
    struct MyString
    {
      	friend ostream& operator <<( ostream& os, const MyString& wrd);
    	int operator== (const MyString& wrd) const;
    	int operator < (const MyString& wrd) const;
    	int operator > (const MyString& wrd) const;
    
    	char *data; //could I use this for Car and Bike
    	char *key;  //could I use this for Car and Bike
    };
    Originally I was working with only the Car class as follows:
    class Car: public BSTree<MyString>

    But now I am creating the Bike class and dont know how to use it with the BSTree class as well. So I need 2 trees.

    Would the BSTree template be defined as :

    template <class T1, class T2> ??? I have seen something like that but dont understand if that is what I am suppose to do. I am not sure if I make any sense or not ...maybe it's because I am so confused.
    simple is always an understatement.....

  4. #4
    Registered User
    Join Date
    Mar 2002
    Posts
    1,595
    Yes, templates may have multiple parameters, such:


    template<class T1, class T2>

    That means that you could have

    BSTree<car, Bike> myBSTree;

    but, knowing what you are trying to do with BStree class, car, Bike, myString etc. would be helpful to anyone who tries to help you sort through this. To have a BSTree that stores data about a group of cars or a group of Bikes, you would do as hk_mp5kpdw indicated. You may not need to have the car class inherit from the BSTree class at all, but then again it may be relevant. When I see the words data a key in the same class I start thinking about maps, but there are other uses for those terms, too, so having a better description of what you want to do would be helpful.

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. Need help with binary search.
    By StateofMind in forum C Programming
    Replies: 6
    Last Post: 05-06-2009, 03:14 PM
  2. Binary Search Trees
    By lorannex in forum C Programming
    Replies: 3
    Last Post: 04-25-2009, 07:24 AM
  3. Performance issue!
    By maven in forum C Programming
    Replies: 42
    Last Post: 03-23-2009, 12:57 PM
  4. Binary Search Trees Part III
    By Prelude in forum A Brief History of Cprogramming.com
    Replies: 16
    Last Post: 10-02-2004, 04:00 PM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21