Title
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
题目大意：删除链表的某个元素
Solution
//cpp:
/**
* 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 *parent=new ListNode(-1);
ListNode *root=parent;
parent->next=head;
while(head){
if(head->val==val){
parent->next=head->next;
head=parent->next;
}else{
parent=head;
head=head->next;
}
}
return root->next;
}
};