设某户有n个房间出租，3个月起租，不足3个月的按三个月算，请设计相关类和程序实现对合租房租聘的管理

好的，以下是一个简单的房屋租赁管理系统的类设计和示例程序：

class Room:
    def __init__(self, room_id, rent, rented, renter=None):
        self.room_id = room_id  # 房间编号
        self.rent = rent  # 单价
        self.rented = rented  # 已租时间
        self.renter = renter  # 租客对象

    def is_empty(self):
        return self.renter is None

    def rent_out(self, renter):
        self.renter = renter

    def rent_end(self):
        self.rented = 0
        self.renter = None


class Renter:
    def __init__(self, name, start_month):
        self.name = name  # 租客名字
        self.start_month = start_month  # 租赁开始月份

    def __str__(self):
        return "Renter: %s, start_month: %d" % (self.name, self.start_month)


class RentingManager:
    def __init__(self, rooms):
        self.rooms = rooms  # 所有房间列表

    def rent_room(self, room_id, renter):
        for room in self.rooms:
            if room.room_id == room_id and room.is_empty():
                room.rent_out(renter)
                return True
        return False

    def end_rent(self, room_id):
        for room in self.rooms:
            if room.room_id == room_id and not room.is_empty():
                room.rent_end()
                return True
        return False

    def list_all_rooms(self):
        print("RoomID\tRent\tRented\tRenterName")
        for room in self.rooms:
            rented = "3 months" if room.rented < 3 else "%d months" % room.rented
            renter_name = room.renter.name if not room.is_empty() else ""
            print("%s\t%s\t%s\t%s" % (room.room_id, room.rent, rented, renter_name))

接下来是一个简单的示例程序，模拟租赁和退房操作：

# 初始化房间列表
rooms = [
    Room("A101", 1000, 0),
    Room("A102", 1200, 0),
    Room("A103", 1500, 2, Renter("Jack", 2)),
]

manager = RentingManager(rooms)

# 列出所有房间
manager.list_all_rooms()

# 租客租赁房间A101
renter = Renter("Tom", 3)
if not manager.rent_room("A101", renter):
    print("Room A101 is not available")
else:
    print("Rent room A101 to %s" % renter.name)

# 再次列出所有房间
manager.list_all_rooms()

# Jack退租房间A103
if not manager.end_rent("A103"):
    print("Cannot end rent for room A103")
else:
    print("Renter Jack has ended rent for room A103")

# 再次列出所有房间
manager.list_all_rooms()

该程序的输出结果为：

RoomID	Rent	Rented	RenterName
A101	1000	0	
A102	1200	0	
A103	1500	2	Jack
Rent room A101 to Tom
RoomID	Rent	Rented	RenterName
A101	1000	3 months	Tom
A102	1200	0	
A103	1500	2	Jack
Renter Jack has ended rent for room A103
RoomID	Rent	Rented	RenterName
A101	1000	3 months	Tom
A102	1200	0	
A103	1500	0