题解 | #链表中倒数第k个结点#

/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 * };
 */
/**
*
 * @param pListHead ListNode类 
 * @param k int整型 
 * @return ListNode类
 */
struct ListNode* FindKthToTail(struct ListNode* pListHead, int k ) 
{
    // write code here
    if(pListHead==NULL)
    {
        return NULL;
    }
    struct ListNode* cur = pListHead;
    int i = 0;
    while(cur!=NULL)
    {
        i++;
        cur = cur->next;
    }
    cur=pListHead;
    if(i==1)
    {
        return cur;
    }
    if(k > i)
    {
        return NULL;
    }
    int j =0;
    for(j = 0;j<i-k;j++)
    {
        cur = cur->next;
    }
    return cur;
}