轉載於劍指Offer
題目:
輸入一個鏈表,反轉鏈表後,輸出鏈表的所有元素。代碼:
class Solution {
public:
ListNode* ReverseList(ListNode* pHead) {
ListNode* pReverseHead = NULL;
ListNode* pNode = pHead;
ListNode* pPrev = NULL;//創建3個指針爲關鍵
while (pNode != NULL){
ListNode* pNext= pNode->next;
if (pNext == NULL)
pReverseHead = pNode;
pNode->next = pPrev;
pPrev = pNode;
pNode = pNext;
}
return pReverseHead;
}
};