面试当时有点紧张，犯2了，居然写了个空间O(N)的垃圾反转代码。其实很简单，刚刚用两三个指针折腾下就行了，代码如下 ：
ZList * ListAlgorithm::ListConverse(ZList *L)
{
ZList *Pre= NULL;
ZList *Cur = L;
ZList *Next = NULL;
while(Cur != NULL)
{
Next = Cur->next;
Cur->next = Pre;
Pre = Cur;
Cur = Next;
}
return Pre;
}