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question：
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
answer：
/** * 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 *p; ListNode *q; p=q=head; while (q!=NULL) { if (q->val==val) { if ( q==head) { p=head=q->next; } else { p->next=q->next; } q=q->next; } else { p=q; q=q->next; } } return head; } };
203. Remove Linked List Elements
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原文地址：http://www.cnblogs.com/Reindeer/p/5625219.html
