c08p407a.txt

来自「Data Abstraction & Problem Solving with 」· 文本 代码 · 共 16 行

#include <cstddef>
typedef desired-type-of-list-item ListItemType;

class ListNode                 // a node on the list
{
private:
   ListNode(): next(NULL) {};
   ListNode(const ListItemType& nodeItem, ListNode *ptr)
            :item(nodeItem), next(ptr) {};
   ListItemType item;          // a data item on the list
   ListNode     *next;         // pointer to next node

   // friend class - can access private parts
   friend class List;
};  // end class