node * 和 node **的使用

#include<iostream>using namespace std;struct node{node* prev;int  value;node* next;};void reverse2(struct node **head){struct node *temp = NULL;struct node *current = *head;cout << "this is the address of my point thinkEEEE " << &(*head) << endl;while (current != NULL){temp = current->prev;current->prev = current->next;current->next = temp;current = current->prev;}if (temp != NULL)*head = temp->prev;cout << "this is the address of my point think@@@@ " << &(*head) << endl;}node * reverse1(struct node *head){struct node *temp = NULL;struct node *current = head;cout << "this is the address of point my thinkQQQQ " << &head << endl;while (current != NULL){temp = current->prev;current->prev = current->next;current->next = temp;current = current->prev;}if (temp != NULL)head = temp->prev;return head;}int main(){/*双向链表1<-->2<-->3*/node node1, node2, node3;node1.prev = NULL;node1.value = 1;node2.prev = &node1;node2.value = 2;node3.prev = &node2;node3.value = 3;node1.next = &node2;node2.next = &node3;node3.next = NULL;node *head = &node1;//head = reverse1(head);reverse2(&head);cout << "this is the address of my point think##### " << &head << endl;    cout << "after the reverse ";while (head != NULL){cout << head->value << "  ";head = head->next;}system("pause");}/*  调用reverse1函数后的结果，可以发现输出的地址是不一样的  this is the address of point my thinkQQQQ  008FF7CC    this is the address of my point think##### 008FF8A0  after the reverse 3  2  1  请按任意键继续. . .*//*   调用reverse2函数后的结果，可以发现输出的地址是一样的   this is the address of my point thinkEEEE  0113FC14   this is the address of my point think@@@@  0113FC14   this is the address of my point think##### 0113FC14   after the reverse 3  2  1  请按任意键继续. . .*/