用pathon完成点菜系统的开发。实现顾客的选座落座点加菜退菜查询菜单

好的，这里是一个完整的点菜系统的 Python 代码，包括选座、落座、点菜、加菜、退菜和查询菜单：

# 初始化菜单
menu = {
    "炒饭": 15,
    "炒面": 12,
    "鱼香肉丝": 20,
    "宫保鸡丁": 18,
    "红烧肉": 22
}

# 初始化座位
seats = [0] * 10

# 初始化订单
orders = {}

# 展示菜单
def show_menu():
    print("欢迎光临餐厅！")
    print("这是我们的菜单：")
    for dish, price in menu.items():
        print(f"{dish}：{price}元")

# 选座
def select_seat():
    while True:
        seat_num = int(input("请选座（请输入座位号，1-10）："))
        if seat_num < 1 or seat_num > 10:
            print("座位号输入有误，请重新输入。")
        elif seats[seat_num - 1] != 0:
            print("该座位已有人选座，请重新选择。")
        else:
            seats[seat_num - 1] = 1
            print(f"您已成功选座{seat_num}号。")
            return seat_num

# 落座
def sit_down(seat_num):
    print(f"请在{seat_num}号座位就座。")

# 点菜
def order_dishes():
    order = {}
    while True:
        dish_name = input("请输入您要点的菜名（输入q结束点菜）：")
        if dish_name == "q":
            break
        elif dish_name in menu:
            dish_price = menu[dish_name]
            dish_num = int(input(f"请输入{dish_name}的数量："))
            order[dish_name] = dish_num
            print(f"{dish_name}已加入您的订单，单价{dish_price}元，数量{dish_num}份。")
        else:
            print("很抱歉，我们没有这道菜。")
    return order

# 加菜
def add_dishes(order):
    while True:
        dish_name = input("请输入您要加的菜名（输入q结束加菜）：")
        if dish_name == "q":
            break
        elif dish_name in menu:
            dish_price = menu[dish_name]
            dish_num = int(input(f"请输入{dish_name}的数量："))
            if dish_name in order:
                order[dish_name] += dish_num
            else:
                order[dish_name] = dish_num
            print(f"{dish_name}已加入您的订单，单价{dish_price}元，数量{dish_num}份。")
        else:
            print("很抱歉，我们没有这道菜。")
    return order

# 退菜
def remove_dishes(order):
    while True:
        dish_name = input("请输入您要退的菜名（输入q结束退菜）：")
        if dish_name == "q":
            break
        elif dish_name in order:
            dish_num = int(input(f"请输入{dish_name}的数量："))
            if dish_num >= order[dish_name]:
                del order[dish_name]
            else:
                order[dish_name] -= dish_num
            print(f"{dish_name}已退掉{dish_num}份。")
        else:
            print("您的订单中没有这道菜。")
    return order

# 查询菜单
def query_menu():
    dish_name = input("请输入您要查询的菜名：")
    if dish_name in menu:
        dish_price = menu[dish_name]
        print(f"{dish_name}的价格是{dish_price}元。")
    else:
        print("很抱歉，我们没有这道菜。")

# 主程序
def main():
    show_menu()
    seat_num = select_seat()
    sit_down(seat_num)
    orders[seat_num] = order_dishes()
    while True:
        action = input("请选择您要进行的操作（输入序号）：1.加菜 2.退菜 3.查询菜单 4.结账 5.换座 6.离开\n")
        if action == "1":
            orders[seat_num] = add_dishes(orders[seat_num])
        elif action == "2":
            orders[seat_num] = remove_dishes(orders[seat_num])
        elif action == "3":
            query_menu()
        elif action == "4":
            total_price = 0
            print(f"您的订单如下：")
            for dish, num in orders[seat_num].items():
                price = menu[dish] * num
                print(f"{dish}：{num}份，共{price}元")
                total_price += price
            print(f"总价为{total_price}元。")
            orders[seat_num] = {}
            seats[seat_num - 1] = 0
            print(f"您已结账，欢迎再次光临！")
            break
        elif action == "5":
            seats[seat_num - 1] = 0
            seat_num = select_seat()
            sit_down(seat_num)
            orders[seat_num] = orders.pop(seat_num_old, {})
        elif action == "6":
            seats[seat_num - 1] = 0
            orders[seat_num] = {}
            print(f"您已离开，欢迎下次光临！")
            break
        else:
            print("输入有误，请重新输入。")

if __name__ == "__main__":
    main()

这个点菜系统包括了选座、落座、点菜、加菜、退菜和查询菜单等功能。用户可以先选座，然后浏览菜单并点菜，如果需要可以加菜或退菜，最后结账离开。同时，用户还可以查询菜单和换座位。系统会根据用户的操作更新订单和座位状态，并展示订单和总价。