帮我用C++写一份较为完整的图书管理系统，能在控制台进行操作，需要基类，派生类，要能进行数据的保存和读取。

好的，以下是一份C++的基于控制台的图书管理系统代码：

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
using namespace std;

// 定义基类Book
class Book {
protected:
    string title; // 书名
    string author; // 作者
    int year; // 出版年份
    int pages; // 页数
public:
    Book(string t, string a, int y, int p) : title(t), author(a), year(y), pages(p) {}
    virtual void display() = 0; // 显示图书信息
    virtual string getType() = 0; // 获取图书类型
    virtual string getInfo() = 0; // 获取图书信息
};

// 定义派生类Fiction
class Fiction : public Book {
private:
    string genre; // 小说类型
public:
    Fiction(string t, string a, int y, int p, string g) : Book(t, a, y, p), genre(g) {}
    void display() {
        cout << "小说: " << title << " 作者: " << author << " 出版年份: " << year << " 页数: " << pages << " 类型: " << genre << endl;
    }
    string getType() {
        return "Fiction";
    }
    string getInfo() {
        return title + "," + author + "," + to_string(year) + "," + to_string(pages) + "," + genre;
    }
};

// 定义派生类NonFiction
class NonFiction : public Book {
private:
    string topic; // 非小说主题
public:
    NonFiction(string t, string a, int y, int p, string tp) : Book(t, a, y, p), topic(tp) {}
    void display() {
        cout << "非小说: " << title << " 作者: " << author << " 出版年份: " << year << " 页数: " << pages << " 主题: " << topic << endl;
    }
    string getType() {
        return "NonFiction";
    }
    string getInfo() {
        return title + "," + author + "," + to_string(year) + "," + to_string(pages) + "," + topic;
    }
};

// 定义图书管理系统类
class BookManager {
private:
    vector<Book*> books; // 存储图书的容器
public:
    BookManager() {
        loadBooks(); // 读取之前保存的图书信息
    }
    // 添加图书
    void addBook(Book* book) {
        books.push_back(book);
        saveBooks(); // 保存图书信息
    }
    // 显示所有图书
    void displayAllBooks() {
        for (auto book : books) {
            book->display();
        }
    }
    // 根据类型显示图书
    void displayBooksByType(string type) {
        for (auto book : books) {
            if (book->getType() == type) {
                book->display();
            }
        }
    }
    // 保存图书信息到文件
    void saveBooks() {
        ofstream file("books.txt");
        for (auto book : books) {
            file << book->getType() << "," << book->getInfo() << endl;
        }
        file.close();
    }
    // 读取文件中的图书信息
    void loadBooks() {
        ifstream file("books.txt");
        if (file) {
            string line;
            while (getline(file, line)) {
                int pos = line.find(",");
                string type = line.substr(0, pos);
                string info = line.substr(pos + 1);
                pos = info.find(",");
                string title = info.substr(0, pos);
                info = info.substr(pos + 1);
                pos = info.find(",");
                string author = info.substr(0, pos);
                info = info.substr(pos + 1);
                pos = info.find(",");
                int year = stoi(info.substr(0, pos));
                info = info.substr(pos + 1);
                pos = info.find(",");
                int pages = stoi(info.substr(0, pos));
                info = info.substr(pos + 1);
                if (type == "Fiction") {
                    pos = info.find(",");
                    string genre = info.substr(0, pos);
                    addBook(new Fiction(title, author, year, pages, genre));
                }
                else if (type == "NonFiction") {
                    pos = info.find(",");
                    string topic = info.substr(0, pos);
                    addBook(new NonFiction(title, author, year, pages, topic));
                }
            }
        }
        file.close();
    }
};

int main() {
    BookManager manager;
    while (true) {
        cout << "请选择操作: " << endl;
        cout << "1. 添加小说" << endl;
        cout << "2. 添加非小说" << endl;
        cout << "3. 显示所有图书" << endl;
        cout << "4. 显示小说" << endl;
        cout << "5. 显示非小说" << endl;
        cout << "6. 退出" << endl;
        int choice;
        cin >> choice;
        if (choice == 1) {
            string title, author, genre;
            int year, pages;
            cout << "请输入小说信息: " << endl;
            cout << "书名: ";
            cin >> title;
            cout << "作者: ";
            cin >> author;
            cout << "出版年份: ";
            cin >> year;
            cout << "页数: ";
            cin >> pages;
            cout << "类型: ";
            cin >> genre;
            manager.addBook(new Fiction(title, author, year, pages, genre));
        }
        else if (choice == 2) {
            string title, author, topic;
            int year, pages;
            cout << "请输入非小说信息: " << endl;
            cout << "书名: ";
            cin >> title;
            cout << "作者: ";
            cin >> author;
            cout << "出版年份: ";
            cin >> year;
            cout << "页数: ";
            cin >> pages;
            cout << "主题: ";
            cin >> topic;
            manager.addBook(new NonFiction(title, author, year, pages, topic));
        }
        else if (choice == 3) {
            manager.displayAllBooks();
        }
        else if (choice == 4) {
            manager.displayBooksByType("Fiction");
        }
        else if (choice == 5) {
            manager.displayBooksByType("NonFiction");
        }
        else if (choice == 6) {
            break;
        }
        else {
            cout << "无效的选择，请重新输入！" << endl;
        }
    }
    return 0;
}

该代码实现了基类Book和派生类Fiction、NonFiction，以及图书管理系统类BookManager，可以在控制台中添加、显示图书，并且能够将图书信息保存到文件中，下次运行程序时可以读取之前保存的图书信息。