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#include 
   
    #include 
    
     #include 
     
      using namespace std;#define ElemType int//C++单链表结点类class LNode {
   public:	ElemType data;	LNode* next;};//C++单链表类class LinkList {
   private:	LNode *head;public:	LinkList();	void createList();	void displayList();	LNode* getHead();};void menu(LinkList* list);void save(LinkList* list);void read(LinkList* list);int main() {
   	LinkList list;	menu(&list);}//构造方法LinkList::LinkList() {
   	head = new LNode();	head -> next = NULL;}//创建单链表void LinkList::createList() {
   	LNode* tail = head;	ElemType x;	cout << "尾插法，请输入整数，输入999截止" << endl;	while (cin >> x) {
   		if (x == 999) {
   			return;		}		LNode* p = new LNode;		p->data = x;		p->next = NULL;		tail->next = p;		tail = p;	}}//打印单链表void LinkList::displayList() {
   	LNode* p = head->next;	while (p) {
   		cout << p->data << " ";		p = p->next;	}	cout << endl;}//获取单链表头结点地址LNode * LinkList::getHead() {
   	return head;}//菜单void menu(LinkList* list) {
   	int a;	cout << "************************************" << endl;	cout << "**     C++链表的文件存取问题      **" << endl;	cout << "************************************" << endl;	while (1) {
   		system("pause");		system("cls");		cout << "********************************" << endl;		cout << "*  1.创建单链表。        *" << endl;		cout << "*  2.打印单链表。        *" << endl;		cout << "*  3.保存单链表。        *" << endl;		cout << "*  4.读取单链表。        *" << endl;		cout << "*  5.按其它键退出并保存。*" << endl;		cout << "********************************" << endl;		cin >> a;		switch (a) {
   		case 1:			list->createList();			break;		case 2:			list->displayList();			break;		case 3:			save(list);			break;		case 4:			read(list);			break;		default:			save(list);			return;		}	}}//保存单链表void save(LinkList* list) {
   	LNode* p = list->getHead()->next;	ofstream outfile;	outfile.open("list.txt", ios::binary);	if (!outfile) {
   		cerr << "open failed" << endl;		return;	}	while (p) {
   		//cout << p->data << endl;		outfile.write((char*)p, sizeof(LNode));		p = p->next;	}	outfile.close();	cout << "链表已保存到 list.txt" << endl;}//读取单链表void read(LinkList* list) {
   	LNode* p = list->getHead();	ifstream infile;	infile.open("list.txt", ios::binary);	if (!infile) {
   		cout << "打开文件失败" << endl;	}	/*	* infile.eof()、iFlie.peek()会多读一行	*/	while (infile.peek() != EOF) {
   		LNode* q = new LNode;		infile.read((char*)q, sizeof(LNode));		cout << q->data << endl;		q->next = NULL;		p->next = q;		p = q;	}	cout << "链表读取成功" << endl;}
     
    
   

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