C++/代码
class Solution { public: ListNode* FindKthToTail(ListNode* pListHead, unsigned int k) { int n = 0; for (auto p = pListHead; p; p = p->next) n ++; //求出链表的长度,p不为空时,继续 if (k > n) return nullptr; //k大于n,非法情况 for (int i = 0; i < n - k; i ++) pListHead = pListHead->next; //求出n-k长度的数值,就是倒数第k个节点 return pListHead; } };