题目：

题解：

class Solution {
public:ListNode* removeElements(ListNode* head, int val) {struct ListNode* dummyHead = new ListNode(0, head);struct ListNode* temp = dummyHead;while (temp->next != NULL) {if (temp->next->val == val) {temp->next = temp->next->next;} else {temp = temp->next;}}return dummyHead->next;}
};