思想:仅需改变每个节点的指向就行,并且保证每个节点都不丢失,所以用了三根指针来记录节点,p1指针用来指向(被指向节点),p2指针用来指向(指向节点),p3指针用来指向(丢失的节点)
具体实现看代码:
Node* ReList(Node* pHead)
{
if(pHead == NULL)return NULL;
if(pHead->pNext == NULL)return pHead;
Node *p1 = NULL;
Node *p2 = NULL;
Node *p3 = NULL;
p2 = pHead;
p3 = p2->pNext;
while(p3 != NULL)
{
p2->pNext = p1;
p1 = p2;
p2 = p3;
p3 = p3->pNext;
}
p2->pNext = p1;
return p2;
}