Remove all elements from a linked list of integers that have value val.
Example
Given: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6
Return: 1 --> 2 --> 3 --> 4 --> 5
思路:简单题。
//Definition for singly-linked list.struct ListNode {int val;ListNode *next;ListNode(int x) : val(x), next(NULL) {}};class Solution { public:ListNode* removeElements(ListNode* head, int val) {ListNode fakeHead = ListNode(0); //伪头部,化简代码fakeHead.next = head;ListNode *p = &fakeHead;while(NULL != p->next){if(p->next->val == val) //当前数字的下一个需要被删除 删掉后重新判断当前位置的下一个数p->next = p->next->next;else //当前位置的下一个不需要删除,把当前位置后移p = p->next;}return fakeHead.next;} };