// linklist.h
#include <iostream.h>
#include "list.h"

class LLNode;
class LinkedList : public List {
    LLNode *root;
  public:
    LinkedList(void);
    ~LinkedList(void);
    LinkedList(const LinkedList &llist); // the copy constructor
    LinkedList &operator = (const LinkedList &llist);
    int Insert(int val); // this does not insert if val already exists
                         // returns 1 if it could insert
                         // could later on also do frequency counts
    int Search(int val);
    void Write(ostream &s);
    friend ostream &operator<<(ostream &s, LinkedList &ll);
    int Empty(void) {return (root ? 0 : 1);}
};

//typedef LinkedList *LinkedListPtr;