写一个c++项目程序设计一个网上购书系统，包含book类，buyer类，buyer类派生了member类、honoured_guest类、layfolk类；order类，容器类，加入文件流输入输出，进行人机交互

好的，我可以为您提供一个大致的实现思路和代码示例。

首先，我们需要定义 Book 类，其中包含书籍的一些基本信息，如书名、作者、出版社、价格等。代码如下：

class Book {
public:
    Book(string name, string author, string publisher, double price) :
        name(name), author(author), publisher(publisher), price(price) {}
    string getName() { return name; }
    string getAuthor() { return author; }
    string getPublisher() { return publisher; }
    double getPrice() { return price; }
private:
    string name;
    string author;
    string publisher;
    double price;
};

接下来，我们需要定义 Buyer 类，其中包含买家的一些基本信息，如姓名、地址、联系方式等。代码如下：

class Buyer {
public:
    Buyer(string name, string address, string phone) :
        name(name), address(address), phone(phone) {}
    string getName() { return name; }
    string getAddress() { return address; }
    string getPhone() { return phone; }
private:
    string name;
    string address;
    string phone;
};

然后，我们可以定义 Member 类、HonouredGuest 类和 Layfolk 类，它们都是 Buyer 类的派生类。代码如下：

class Member : public Buyer {
public:
    Member(string name, string address, string phone, int level, int points) :
        Buyer(name, address, phone), level(level), points(points) {}
    int getLevel() { return level; }
    int getPoints() { return points; }
private:
    int level;
    int points;
};

class HonouredGuest : public Buyer {
public:
    HonouredGuest(string name, string address, string phone, string specialReq) :
        Buyer(name, address, phone), specialReq(specialReq) {}
    string getSpecialReq() { return specialReq; }
private:
    string specialReq;
};

class Layfolk : public Buyer {
public:
    Layfolk(string name, string address, string phone) :
        Buyer(name, address, phone) {}
};

接下来，我们需要定义 Order 类，用于表示订单信息，包含订单编号、买家信息、购买书籍信息等。代码如下：

class Order {
public:
    Order(int id, Buyer* buyer, Book* book, int quantity) :
        id(id), buyer(buyer), book(book), quantity(quantity) {}
    int getId() { return id; }
    Buyer* getBuyer() { return buyer; }
    Book* getBook() { return book; }
    int getQuantity() { return quantity; }
private:
    int id;
    Buyer* buyer;
    Book* book;
    int quantity;
};

然后，我们可以定义一个容器类，用于存储所有的订单信息。可以定义一些函数来添加、删除、修改订单信息等。代码如下：

class OrderContainer {
public:
    void addOrder(Order* order) {
        orders.push_back(order);
    }
    void removeOrder(int id) {
        for (auto it = orders.begin(); it != orders.end(); it++) {
            if ((*it)->getId() == id) {
                orders.erase(it);
                break;
            }
        }
    }
    void modifyOrder(int id, int quantity) {
        for (auto it = orders.begin(); it != orders.end(); it++) {
            if ((*it)->getId() == id) {
                (*it)->getBook()->setQuantity(quantity);
                break;
            }
        }
    }
private:
    vector<Order*> orders;
};

最后，我们需要实现文件流输入输出和人机交互。可以定义一些函数来读取和写入订单信息，以及与用户进行交互，如显示菜单、接收用户输入等。代码如下：

void addOrder(OrderContainer& container) {
    int id, type, quantity;
    string name, address, phone, specialReq, bookName, author, publisher;
    double price;
    cout << "请输入订单编号：";
    cin >> id;
    cout << "请选择买家类型（1.普通买家 2.会员 3.贵宾）：";
    cin >> type;
    cout << "请输入买家姓名：";
    cin >> name;
    cout << "请输入买家地址：";
    cin >> address;
    cout << "请输入买家电话：";
    cin >> phone;
    switch (type) {
    case 1:
        container.addOrder(new Order(id, new Layfolk(name, address, phone), nullptr, 0));
        break;
    case 2:
        int level, points;
        cout << "请输入会员等级：";
        cin >> level;
        cout << "请输入会员积分：";
        cin >> points;
        container.addOrder(new Order(id, new Member(name, address, phone, level, points), nullptr, 0));
        break;
    case 3:
        cout << "请输入特殊要求：";
        cin >> specialReq;
        container.addOrder(new Order(id, new HonouredGuest(name, address, phone, specialReq), nullptr, 0));
        break;
    }
    cout << "请输入书籍名称：";
    cin >> bookName;
    cout << "请输入书籍作者：";
    cin >> author;
    cout << "请输入书籍出版社：";
    cin >> publisher;
    cout << "请输入书籍价格：";
    cin >> price;
    cout << "请输入书籍数量：";
    cin >> quantity;
    container.addOrder(new Order(id, container.getBuyer(id), new Book(bookName, author, publisher, price), quantity));
}

void removeOrder(OrderContainer& container) {
    int id;
    cout << "请输入订单编号：";
    cin >> id;
    container.removeOrder(id);
}

void modifyOrder(OrderContainer& container) {
    int id, quantity;
    cout << "请输入订单编号：";
    cin >> id;
    cout << "请输入书籍数量：";
    cin >> quantity;
    container.modifyOrder(id, quantity);
}

void showMenu() {
    cout << "欢迎使用网上购书系统！" << endl;
    cout << "1. 添加订单" << endl;
    cout << "2. 删除订单" << endl;
    cout << "3. 修改订单" << endl;
    cout << "4. 退出系统" << endl;
}

int main() {
    OrderContainer container;
    int choice;
    do {
        showMenu();
        cin >> choice;
        switch (choice) {
        case 1:
            addOrder(container);
            break;
        case 2:
            removeOrder(container);
            break;
        case 3:
            modifyOrder(container);
            break;
        }
    } while (choice != 4);
    return 0;
}

这是一个初步的实现，具体细节还需要根据实际需求进行调整。希望能够帮助到您。