倒插法实现链表逆置

1:  void invert(LinkedList &head)

2:  {

3:     LinkedList p;//指向当前工作节点

4:      LinkedList pn;//指向工作节点的前驱节点

5:   

6:      //初始化,p指向链表第一个节点，head->next=NULL，即为单独的表头节点。

7:      p = head->next;

8:      head->next = NULL;

9:   

10:      while (p)

11:      {

12:          pn = p->next;

13:          p->next = head->next;

14:          head->next = p;

15:          p = pn;

16:      }

17:   

18:   

19:  }

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