LeetCode Remove Linked List Elements 删除链表元素

 1 /**
 2  * Definition for singly-linked list.
 3  * struct ListNode {
 4  *     int val;
 5  *     ListNode *next;
 6  *     ListNode(int x) : val(x), next(NULL) {}
 7  * };
 8  */
 9 class Solution {
10 public:
11     ListNode* removeElements(ListNode* head, int val) {
12         while(head&&head->val==val)    head=head->next;
13         if(!head)    return 0;
14         ListNode *tmp=head;
15         while(head&&head->next)
16         {
17             if(head->next->val==val)
18                 head->next=head->next->next;
19             else
20                 head=head->next;
21         }
22         return tmp;
23     }
24 };