C++로 간단한 일기 프로그램을 작성하는 방법은 무엇입니까?

struct Diary {
    std::string date;
    std::string title;
    std::string content;
};

class DiaryBook {
public:
    void addDiary();
    void viewDiary();
    void editDiary();
    void deleteDiary();
private:
    std::vector<Diary> diaries;
};

void DiaryBook::addDiary() {
    Diary newDiary;
    std::cout << "请输入日期：";
    std::cin >> newDiary.date;
    std::cout << "请输入标题：";
    std::cin >> newDiary.title;
    std::cout << "请输入内容：";
    std::cin >> newDiary.content;
    diaries.push_back(newDiary);
}

void DiaryBook::viewDiary() {
    if (diaries.empty()) {
        std::cout << "日记本为空！" << std::endl;
        return;
    }
    
    std::cout << "请选择要查看的日记：" << std::endl;
    for (int i = 0; i < diaries.size(); i++) {
        std::cout << i + 1 << ". " << diaries[i].title << std::endl;
    }
    
    int choice;
    std::cin >> choice;
    
    if (choice >= 1 && choice <= diaries.size()) {
        const Diary& selectedDiary = diaries[choice - 1];
        std::cout << "日期：" << selectedDiary.date << std::endl;
        std::cout << "标题：" << selectedDiary.title << std::endl;
        std::cout << "内容：" << selectedDiary.content << std::endl;
    } else {
        std::cout << "选择无效！" << std::endl;
    }
}

int main() {
    DiaryBook diaryBook;
    
    while (true) {
        std::cout << "请选择操作：" << std::endl;
        std::cout << "1. 添加日记" << std::endl;
        std::cout << "2. 查看日记" << std::endl;
        std::cout << "3. 编辑日记" << std::endl;
        std::cout << "4. 删除日记" << std::endl;
        std::cout << "0. 退出" << std::endl;
        
        int choice;
        std::cin >> choice;
        
        switch (choice) {
            case 1:
                diaryBook.addDiary();
                break;
            case 2:
                diaryBook.viewDiary();
                break;
            case 3:
                diaryBook.editDiary();
                break;
            case 4:
                diaryBook.deleteDiary();
                break;
            case 0:
                return 0;
            default:
                std::cout << "选择无效！" << std::endl;
                break;
        }
    }
    
    return 0;
}