题解 | #链表中倒数第k个结点#

/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 * };
 */
//快慢指针
/**
 * 
 * @param pListHead ListNode类 
 * @param k int整型 
 * @return ListNode类
 */
struct ListNode* FindKthToTail(struct ListNode* pListHead, int k ) {
    // write code here
    struct ListNode*slow,*fast;
    slow=fast=pListHead;
    while(k--)
    {
        if(fast==NULL)
    {
        return NULL;
    }
         fast=fast->next;
    }
    while(fast)
    {
        slow=slow->next;
        fast=fast->next;
    }
        return slow;  
}