LeetCode 203. 移除链表元素

 1 /**
 2  * Definition for singly-linked list.
 3  * struct ListNode {
 4  *     int val;
 5  *     struct ListNode *next;
 6  * };
 7  */
 8 struct ListNode* removeElements(struct ListNode* head, int val){
 9     while(head!=NULL&&head->val==val){
10         head=head->next;
11     }
12     if(head==NULL) return NULL;
13     struct ListNode *p=head;
14     while(p->next!=NULL){
15         if(p->next->val==val) p->next=p->next->next;
16         else p=p->next;
17     }
18     return head;
19 }