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【LeetCode】237. Delete Node in a Linked List

题目:

Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.

Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third node with value 3, the linked list should become 1 -> 2 -> 4 after calling your function.

提示:

此题主要考察对链表的操作,函数的操作过程如下所示:

  1. 比如我们这里要删除的节点是节点2;
  2. 首先创建一个指向节点3的指针,然后将节点2赋值为节点3,此时的链表状态如第二行所示;
  3. 最后别忘记将节点3删除(通过删除之前创建的指针)。

代码:

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     ListNode *next;
 *     ListNode(int x) : val(x), next(NULL) {}
 * };
 */
class Solution {
public:
    void deleteNode(ListNode* node) {
        ListNode *next = node->next;
        *node = *next;
        delete next;
    }
};

 

posted @ 2015-08-17 17:11  __Neo  阅读(124)  评论(0编辑  收藏  举报