链表做图书馆管理系统

链表是一种常用的数据结构，可以用来实现图书馆管理系统。具体实现方法如下：

1.定义图书类，包括书名、作者、出版社、出版日期、ISBN号等属性。

2.定义节点类，包括图书类对象和指向下一个节点的指针。

3.定义链表类，包括头节点和尾节点。

4.实现链表的增删改查功能，包括添加图书、删除图书、修改图书信息、查找图书等。

5.实现借书还书功能，包括借出图书、归还图书等。

下面是一个简单的Python实现示例：

class Book:
    def __init__(self, name, author, publisher, pub_date, isbn):
        self.name = name
        self.author = author
        self.publisher = publisher
        self.pub_date = pub_date
        self.isbn = isbn

class Node:
    def __init__(self, book):
        self.book = book
        self.next = None

class LinkedList:
    def __init__(self):
        self.head = None
        self.tail = None

    def add_book(self, book):
        node = Node(book)
        if not self.head:
            self.head = node
            self.tail = node
        else:
            self.tail.next = node
            self.tail = node

    def remove_book(self, name):
        if not self.head:
            return
        if self.head.book.name == name:
            self.head = self.head.next
            return
        prev = self.head
        curr = self.head.next
        while curr:
            if curr.book.name == name:
                prev.next = curr.next
                if not curr.next:
                    self.tail = prev
                return
            prev = curr
            curr = curr.next

    def modify_book(self, name, author, publisher, pub_date, isbn):
        curr = self.head
        while curr:
            if curr.book.name == name:
                curr.book.author = author
                curr.book.publisher = publisher
                curr.book.pub_date = pub_date
                curr.book.isbn = isbn
                return
            curr = curr.next

    def search_book(self, name):
        curr = self.head
        while curr:
            if curr.book.name == name:
                return curr.book
            curr = curr.next
        return None

    def lend_book(self, name):
        book = self.search_book(name)
        if book:
            self.remove_book(name)
            return book
        else:
            return None

    def return_book(self, book):
        self.add_book(book)

# 示例代码
book1 = Book("Python编程从入门到实践", "Eric Matthes", "人民邮电出版社", "2016-11-1", "9787115428028")
book2 = Book("流畅的Python", "Luciano Ramalho", "人民邮电出版社", "2018-1-1", "9787111596660")
book3 = Book("Python核心编程", "Wesley Chun", "人民邮电出版社", "2014-1-1", "9787115299697")

linked_list = LinkedList()
linked_list.add_book(book1)
linked_list.add_book(book2)
linked_list.add_book(book3)

book = linked_list.lend_book("Python编程从入门到实践")
if book:
    print("借出图书：", book.name)
else:
    print("没有找到该图书")

book = linked_list.lend_book("Python编程从入门到实践")
if book:
    print("借出图书：", book.name)
else:
    print("没有找到该图书")

linked_list.return_book(book)

book = linked_list.lend_book("Python编程从入门到实践")
if book:
    print("借出图书：", book.name)
else:
    print("没有找到该图书")