c++实现图书管理系统

下面是一个简单的图书管理系统的 C++ 实现。该系统包含以下功能：

1. 添加图书
2. 删除图书
3. 显示所有图书
4. 搜索图书
5. 借阅图书
6. 归还图书

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

// 定义图书类
class Book {
public:
    Book(string name, string author, int id) : name(name), author(author), id(id), borrowed(false) {}

    string getName() const {
        return name;
    }

    string getAuthor() const {
        return author;
    }

    int getId() const {
        return id;
    }

    bool isBorrowed() const {
        return borrowed;
    }

    void setBorrowed(bool borrowed) {
        this->borrowed = borrowed;
    }

private:
    string name;
    string author;
    int id;
    bool borrowed;
};

// 定义图书管理系统类
class Library {
public:
    Library() : nextId(1) {}

    // 添加图书
    void addBook(string name, string author) {
        books.push_back(Book(name, author, nextId++));
        cout << "添加图书成功！" << endl;
    }

    // 删除图书
    void removeBook(int id) {
        auto it = find_if(books.begin(), books.end(), [id](const Book& book) {
            return book.getId() == id;
        });
        if (it != books.end()) {
            books.erase(it);
            cout << "删除图书成功！" << endl;
        } else {
            cout << "找不到指定的图书！" << endl;
        }
    }

    // 显示所有图书
    void displayAllBooks() {
        cout << "所有图书：" << endl;
        for (const auto& book : books) {
            cout << "ID：" << book.getId() << "，书名：" << book.getName()
                 << "，作者：" << book.getAuthor() << "，状态：" << (book.isBorrowed() ? "借出" : "未借出") << endl;
        }
    }

    // 搜索图书
    void searchBook(string keyword) {
        cout << "搜索结果：" << endl;
        for (const auto& book : books) {
            if (book.getName().find(keyword) != string::npos || book.getAuthor().find(keyword) != string::npos) {
                cout << "ID：" << book.getId() << "，书名：" << book.getName()
                     << "，作者：" << book.getAuthor() << "，状态：" << (book.isBorrowed() ? "借出" : "未借出") << endl;
            }
        }
    }

    // 借阅图书
    void borrowBook(int id) {
        auto it = find_if(books.begin(), books.end(), [id](const Book& book) {
            return book.getId() == id;
        });
        if (it != books.end()) {
            if (it->isBorrowed()) {
                cout << "该图书已被借出！" << endl;
            } else {
                it->setBorrowed(true);
                cout << "借阅成功！" << endl;
            }
        } else {
            cout << "找不到指定的图书！" << endl;
        }
    }

    // 归还图书
    void returnBook(int id) {
        auto it = find_if(books.begin(), books.end(), [id](const Book& book) {
            return book.getId() == id;
        });
        if (it != books.end()) {
            if (it->isBorrowed()) {
                it->setBorrowed(false);
                cout << "归还成功！" << endl;
            } else {
                cout << "该图书未被借出！" << endl;
            }
        } else {
            cout << "找不到指定的图书！" << endl;
        }
    }

private:
    vector<Book> books;
    int nextId;
};

int main() {
    Library library;

    while (true) {
        cout << "请选择操作：" << endl;
        cout << "1. 添加图书" << endl;
        cout << "2. 删除图书" << endl;
        cout << "3. 显示所有图书" << endl;
        cout << "4. 搜索图书" << endl;
        cout << "5. 借阅图书" << endl;
        cout << "6. 归还图书" << endl;
        cout << "0. 退出" << endl;

        int choice;
        cin >> choice;

        switch (choice) {
            case 1: {
                cout << "请输入书名和作者：" << endl;
                string name, author;
                cin >> name >> author;
                library.addBook(name, author);
                break;
            }
            case 2: {
                cout << "请输入图书 ID：" << endl;
                int id;
                cin >> id;
                library.removeBook(id);
                break;
            }
            case 3: {
                library.displayAllBooks();
                break;
            }
            case 4: {
                cout << "请输入搜索关键字：" << endl;
                string keyword;
                cin >> keyword;
                library.searchBook(keyword);
                break;
            }
            case 5: {
                cout << "请输入图书 ID：" << endl;
                int id;
                cin >> id;
                library.borrowBook(id);
                break;
            }
            case 6: {
                cout << "请输入图书 ID：" << endl;
                int id;
                cin >> id;
                library.returnBook(id);
                break;
            }
            case 0: {
                return 0;
            }
            default: {
                cout << "无效选择！" << endl;
                break;
            }
        }
    }
}

这只是一个简单的实现，实际应用中可能需要更复杂的实现，例如数据库存储等。