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，这是一个比较复杂的项目，需要一步一步来完成。首先，我们需要设计类的继承关系。在本项目中，我们可以将图书馆中的书籍分为两类：普通书籍和期刊杂志。因此，我们可以设计一个基类 Book，然后派生出两个类，分别为 OrdinaryBook 和 Magazine。

接下来，我们需要考虑如何进行数据的保存和读取。这里，我建议使用文件来进行存储，可以将每个书籍的信息存储在一个单独的文件中，方便进行管理。在读取数据时，我们可以遍历文件夹，将每个文件中的信息读取出来，然后创建对应的对象，加入到图书馆中。

下面是一个简单的代码示例，仅供参考：

#include <iostream>
#include <fstream>
#include <vector>
#include <string>

using namespace std;

class Book {
public:
    Book(string name, string author, string publisher, int year) : m_name(name), m_author(author), m_publisher(publisher), m_year(year) {};
    virtual void display() = 0;
    virtual void saveToFile(string filename) = 0;
    virtual void readFromFile(string filename) = 0;
protected:
    string m_name;
    string m_author;
    string m_publisher;
    int m_year;
};

class OrdinaryBook : public Book {
public:
    OrdinaryBook(string name, string author, string publisher, int year, int pages) : Book(name, author, publisher, year), m_pages(pages) {};
    virtual void display() {
        cout << "书名：" << m_name << endl;
        cout << "作者：" << m_author << endl;
        cout << "出版社：" << m_publisher << endl;
        cout << "出版年份：" << m_year << endl;
        cout << "页数：" << m_pages << endl;
    }
    virtual void saveToFile(string filename) {
        ofstream fout(filename);
        fout << "ordinary_book" << endl;
        fout << m_name << endl;
        fout << m_author << endl;
        fout << m_publisher << endl;
        fout << m_year << endl;
        fout << m_pages << endl;
        fout.close();
    }
    virtual void readFromFile(string filename) {
        ifstream fin(filename);
        string type;
        getline(fin, type);
        getline(fin, m_name);
        getline(fin, m_author);
        getline(fin, m_publisher);
        fin >> m_year;
        fin >> m_pages;
        fin.close();
    }
private:
    int m_pages;
};

class Magazine : public Book {
public:
    Magazine(string name, string author, string publisher, int year, int issue) : Book(name, author, publisher, year), m_issue(issue) {};
    virtual void display() {
        cout << "杂志名：" << m_name << endl;
        cout << "主编：" << m_author << endl;
        cout << "出版社：" << m_publisher << endl;
        cout << "出版年份：" << m_year << endl;
        cout << "期号：" << m_issue << endl;
    }
    virtual void saveToFile(string filename) {
        ofstream fout(filename);
        fout << "magazine" << endl;
        fout << m_name << endl;
        fout << m_author << endl;
        fout << m_publisher << endl;
        fout << m_year << endl;
        fout << m_issue << endl;
        fout.close();
    }
    virtual void readFromFile(string filename) {
        ifstream fin(filename);
        string type;
        getline(fin, type);
        getline(fin, m_name);
        getline(fin, m_author);
        getline(fin, m_publisher);
        fin >> m_year;
        fin >> m_issue;
        fin.close();
    }
private:
    int m_issue;
};

class Library {
public:
    void addBook(Book* book) {
        m_books.push_back(book);
    }
    void displayAllBooks() {
        for (int i = 0; i < m_books.size(); i++) {
            cout << "编号：" << i << endl;
            m_books[i]->display();
            cout << endl;
        }
    }
    void saveAllBooks() {
        for (int i = 0; i < m_books.size(); i++) {
            string filename = "book_" + to_string(i) + ".txt";
            m_books[i]->saveToFile(filename);
        }
    }
    void readAllBooks() {
        m_books.clear();
        int i = 0;
        while (true) {
            string filename = "book_" + to_string(i) + ".txt";
            ifstream fin(filename);
            if (!fin.good()) {
                break;
            }
            string type;
            getline(fin, type);
            if (type == "ordinary_book") {
                string name, author, publisher;
                int year, pages;
                getline(fin, name);
                getline(fin, author);
                getline(fin, publisher);
                fin >> year;
                fin >> pages;
                OrdinaryBook* book = new OrdinaryBook(name, author, publisher, year, pages);
                m_books.push_back(book);
            }
            else if (type == "magazine") {
                string name, author, publisher;
                int year, issue;
                getline(fin, name);
                getline(fin, author);
                getline(fin, publisher);
                fin >> year;
                fin >> issue;
                Magazine* book = new Magazine(name, author, publisher, year, issue);
                m_books.push_back(book);
            }
            fin.close();
            i++;
        }
    }
private:
    vector<Book*> m_books;
};

int main() {
    Library library;
    library.readAllBooks();
    while (true) {
        cout << "请输入操作编号：" << endl;
        cout << "1. 添加书籍" << endl;
        cout << "2. 显示所有书籍" << endl;
        cout << "3. 保存所有书籍" << endl;
        cout << "4. 退出" << endl;
        int choice;
        cin >> choice;
        if (choice == 1) {
            cout << "请输入书籍类型（1. 普通书籍，2. 期刊杂志）：" << endl;
            int type;
            cin >> type;
            cout << "请输入书名：" << endl;
            string name;
            cin >> name;
            cout << "请输入作者：" << endl;
            string author;
            cin >> author;
            cout << "请输入出版社：" << endl;
            string publisher;
            cin >> publisher;
            cout << "请输入出版年份：" << endl;
            int year;
            cin >> year;
            if (type == 1) {
                cout << "请输入页数：" << endl;
                int pages;
                cin >> pages;
                Book* book = new OrdinaryBook(name, author, publisher, year, pages);
                library.addBook(book);
            }
            else if (type == 2) {
                cout << "请输入期号：" << endl;
                int issue;
                cin >> issue;
                Book* book = new Magazine(name, author, publisher, year, issue);
                library.addBook(book);
            }
        }
        else if (choice == 2) {
            library.displayAllBooks();
        }
        else if (choice == 3) {
            library.saveAllBooks();
        }
        else if (choice == 4) {
            break;
        }
    }
    return 0;
}

以上是一个简单的图书管理系统的实现，仅供参考。实际项目中，还需要考虑更多的细节问题，例如输入的合法性检查、异常处理等等。