C++ 框架如何利用面向对象设计原则支持可扩展性和维护性？

class File {

public:

    virtual void Read(std::string path) = 0;

    virtual void Write(std::string path, std::string data) = 0;

};

class TextFile : public File {

public:

    void Read(std::string path) override {

        std::ifstream ifs(path);

        // ... 操作

    }

    void Write(std::string path, std::string data) override {

        std::ofstream ofs(path);

        // ... 操作

    }

};

class BinaryFile : public File {

public:

    void Read(std::string path) override {

        std::ifstream ifs(path, std::iOS::binary);

        // ... 操作

    }

    void Write(std::string path, std::string data) override {

        std::ofstream ofs(path, std::ios::binary);

        // ... 操作

    }

};

int main() {

    // 使用多态性

    File* file = new TextFile();

    file->Read("example.txt");

    file->Write("example.txt", "This is some text");

}