图书借阅程序示例，其中包含添加书籍、借阅书籍和归还书籍，借阅人信息及查询的功能

这是一个简单的图书借阅程序示例，包含添加书籍、借阅书籍和归还书籍，借阅人信息及查询的功能。代码使用 Python 语言编写。

class Book:
    def __init__(self, title, author, ISBN, num_copies):
        self.title = title
        self.author = author
        self.ISBN = ISBN
        self.num_copies = num_copies
        self.num_borrowed = 0

    def borrow(self):
        if self.num_borrowed < self.num_copies:
            self.num_borrowed += 1
            return True
        else:
            return False

    def return_book(self):
        if self.num_borrowed > 0:
            self.num_borrowed -= 1
            return True
        else:
            return False

class Library:
    def __init__(self):
        self.books = []

    def add_book(self, book):
        self.books.append(book)

    def borrow_book(self, title):
        for book in self.books:
            if book.title == title:
                if book.borrow():
                    return True
                else:
                    return False
        return False

    def return_book(self, title):
        for book in self.books:
            if book.title == title:
                if book.return_book():
                    return True
                else:
                    return False
        return False

    def search_book(self, title):
        for book in self.books:
            if book.title == title:
                return book
        return None

class Borrower:
    def __init__(self, name, ID):
        self.name = name
        self.ID = ID
        self.borrowed_books = []

    def borrow_book(self, book):
        if book.borrow():
            self.borrowed_books.append(book)
            return True
        else:
            return False

    def return_book(self, book):
        if book.return_book():
            self.borrowed_books.remove(book)
            return True
        else:
            return False

    def search_borrowed_books(self, title):
        for book in self.borrowed_books:
            if book.title == title:
                return book
        return None

使用示例：

# 创建书籍
book1 = Book("The Great Gatsby", "F. Scott Fitzgerald", "9781847496140", 5)
book2 = Book("To Kill a Mockingbird", "Harper Lee", "9780446310789", 3)
book3 = Book("1984", "George Orwell", "9780141036144", 2)

# 创建图书馆
library = Library()

# 添加书籍
library.add_book(book1)
library.add_book(book2)
library.add_book(book3)

# 借阅书籍
library.borrow_book("1984")

# 归还书籍
library.return_book("1984")

# 查询书籍
book = library.search_book("The Great Gatsby")

# 创建借阅者
borrower = Borrower("John Smith", "123456")

# 借阅书籍
borrower.borrow_book(book1)

# 查询借阅的书籍
borrowed_book = borrower.search_borrowed_books("The Great Gatsby")