如何使用C++编写一个简单的学生宿舍管理系统？

struct Student {
    string name;
    int id;
    string gender;
    string contact;
};

class DORMitory {
    private:
        int number;
        int floors;
        int roomsPerFloor;
        vector<vector<Student>> rooms;
    public:
        // 构造函数
        Dormitory(int n, int f, int r) {
            number = n;
            floors = f;
            roomsPerFloor = r;
            rooms.resize(floors, vector<Student>(roomsPerFloor));
        }
        // 获取宿舍楼号
        int getNumber() {
            return number;
        }
        // 获取楼层数
        int getFloors() {
            return floors;
        }
        // 获取每层宿舍房间数
        int getRoomsPerFloor() {
            return roomsPerFloor;
        }
        // 获取指定房间的学生信息
        Student getStudent(int floor, int room) {
            return rooms[floor][room];
        }
        // 更新指定房间的学生信息
        void updateStudent(int floor, int room, Student student) {
            rooms[floor][room] = student;
        }
};

class DormitoryManagementSystem {
    private:
        vector<Dormitory> dormitories;
    public:
        // 添加宿舍楼
        void aDDDormitory(int number, int floors, int roomsPerFloor) {
            dormitories.push_back(Dormitory(number, floors, roomsPerFloor));
        }
        // 获取宿舍楼个数
        int getDormitoryCount() {
            return dormitories.size();
        }
        // 获取指定宿舍楼对象
        Dormitory getDormitory(int index) {
            return dormitories[index];
        }
        // 获取指定宿舍楼的房间数
        int getRoomCount(int index) {
            return dormitories[index].getFloors() * dormitories[index].getRoomsPerFloor();
        }
        // 获取指定宿舍楼指定房间的学生信息
        Student getStudent(int index, int floor, int room) {
            return dormitories[index].getStudent(floor, room);
        }
        // 更新指定宿舍楼指定房间的学生信息
        void updateStudent(int index, int floor, int room, Student student) {
            dormitories[index].updateStudent(floor, room, student);
        }
};

int main() {
    DormitoryManagementSystem system;
    int choice;
    do {
        cout << "1. 添加宿舍楼" << endl;
        cout << "2. 查看宿舍楼信息" << endl;
        cout << "3. 添加学生信息" << endl;
        cout << "4. 查看学生信息" << endl;
        cout << "0. 退出" << endl;
        cout << "请输入选项：";
        cin >> choice;
        switch (choice) {
            case 1:
                int number, floors, roomsPerFloor;
                cout << "请输入宿舍楼号：";
                cin >> number;
                cout << "请输入楼层数：";
                cin >> floors;
                cout << "请输入每层宿舍房间数：";
                cin >> roomsPerFloor;
                system.addDormitory(number, floors, roomsPerFloor);
                cout << "成功添加宿舍楼！" << endl;
                break;
            case 2:
                int index;
                cout << "请输入要查看的宿舍楼索引：";
                cin >> index;
                if (index >= 0 && index < system.getDormitoryCount()) {
                    Dormitory dorm = system.getDormitory(index);
                    cout << "宿舍楼号：" << dorm.getNumber() << endl;
                    cout << "楼层数：" << dorm.getFloors() << endl;
                    cout << "每层宿舍房间数：" << dorm.getRoomsPerFloor() << endl;
                    cout << "总房间数：" << system.getRoomCount(index) << endl;
                } else {
                    cout << "宿舍楼索引无效！" << endl;
                }
                break;
            case 3:
                int dormIndex, floor, room;
                string name, gender, contact;
                cout << "请输入要添加学生的宿舍楼索引：";
                cin >> dormIndex;
                if (dormIndex >= 0 && dormIndex < system.getDormitoryCount()) {
                    cout << "请输入学生所在楼层：";
                    cin >> floor;
                    cout << "请输入学生所在房间：";
                    cin >> room;
                    cout << "请输入学生姓名：";
                    cin >> name;
                    cout << "请输入学生性别：";
                    cin >> gender;
                    cout << "请输入学生联系方式：";
                    cin >> contact;
                    system.updateStudent(dormIndex, floor, room, {name, 0, gender, contact});
                    cout << "成功添加学生信息！" << endl;
                } else {
                    cout << "宿舍楼索引无效！" << endl;
                }
                break;
            case 4:
                int dormIndex, floor, room;
                cout << "请输入要查看学生的宿舍楼索引：";
                cin >> dormIndex;
                if (dormIndex >= 0 && dormIndex < system.getDormitoryCount()) {
                    cout << "请输入要查看学生的楼层：";
                    cin >> floor;
                    cout << "请输入要查看学生的房间：";
                    cin >> room;
                    Student student = system.getStudent(dormIndex, floor, room);
                    cout << "学生姓名：" << student.name << endl;
                    cout << "学生学号：" << student.id << endl;
                    cout << "学生性别：" << student.gender << endl;
                    cout << "学生联系方式：" << student.contact << endl;
                } else {
                    cout << "宿舍楼索引无效！" << endl;
                }
                break;
            case 0:
                break;
            default:
                cout << "无效选项，请重新输入！" << endl;
                break;
        }
        cout << endl;
    } while (choice != 0);
    return 0;
}