酒店管理系统代码：登记入住信息，查询客房类型，查询客房信息 ，修改客房信息，删除客房信息，办理退房，退出系统

以下是一个简单的酒店管理系统的代码示例，实现了登记入住信息、查询客房类型、查询客房信息、修改客房信息、删除客房信息、办理退房和退出系统功能。代码使用Python语言编写，可以直接在命令行或Python IDE中运行。

class Room:
    def __init__(self, room_no, room_type, price, status):
        self.room_no = room_no
        self.room_type = room_type
        self.price = price
        self.status = status

class Hotel:
    def __init__(self):
        self.rooms = []

    def add_room(self, room_no, room_type, price, status):
        room = Room(room_no, room_type, price, status)
        self.rooms.append(room)

    def display_room_types(self):
        room_types = set([room.room_type for room in self.rooms])
        print("Available room types:")
        for room_type in room_types:
            print(room_type)

    def display_rooms(self):
        print("All rooms:")
        for room in self.rooms:
            print(f"Room {room.room_no}: Type - {room.room_type}, Price - {room.price}, Status - {room.status}")

    def update_room(self, room_no, room_type, price, status):
        for room in self.rooms:
            if room.room_no == room_no:
                room.room_type = room_type
                room.price = price
                room.status = status
                break

    def delete_room(self, room_no):
        for room in self.rooms:
            if room.room_no == room_no:
                self.rooms.remove(room)
                break

    def check_in(self, room_no):
        for room in self.rooms:
            if room.room_no == room_no:
                if room.status == "Available":
                    room.status = "Occupied"
                    print(f"Checked in to Room {room_no}")
                else:
                    print("Room is not available for check-in")
                break

    def check_out(self, room_no):
        for room in self.rooms:
            if room.room_no == room_no:
                if room.status == "Occupied":
                    room.status = "Available"
                    print(f"Checked out of Room {room_no}")
                else:
                    print("Room is not occupied")
                break

def main():
    hotel = Hotel()

    # Add rooms
    hotel.add_room("101", "Single", 100, "Available")
    hotel.add_room("102", "Single", 100, "Available")
    hotel.add_room("201", "Double", 150, "Available")
    hotel.add_room("202", "Double", 150, "Available")

    while True:
        print("1. Display available room types")
        print("2. Display all rooms")
        print("3. Update room")
        print("4. Delete room")
        print("5. Check in")
        print("6. Check out")
        print("7. Exit")

        choice = input("Enter your choice: ")

        if choice == "1":
            hotel.display_room_types()
        elif choice == "2":
            hotel.display_rooms()
        elif choice == "3":
            room_no = input("Enter room number: ")
            room_type = input("Enter room type: ")
            price = input("Enter price: ")
            status = input("Enter status: ")
            hotel.update_room(room_no, room_type, price, status)
        elif choice == "4":
            room_no = input("Enter room number: ")
            hotel.delete_room(room_no)
        elif choice == "5":
            room_no = input("Enter room number: ")
            hotel.check_in(room_no)
        elif choice == "6":
            room_no = input("Enter room number: ")
            hotel.check_out(room_no)
        elif choice == "7":
            break
        else:
            print("Invalid choice")

if __name__ == "__main__":
    main()

使用方法：

1. 运行代码，进入酒店管理系统。
2. 选择不同的功能，按照提示进行操作。
3. 当选择退出系统时，程序结束。