订餐系统python代码实现

好的，以下是一个简单的Python代码实现订餐系统的例子，您可以参考一下：

# 订餐系统

# 已点餐列表
order_list = []

while True:
    print("点餐主界面")
    print("1、炒菜")
    print("2、主食")
    print("3、饮料")
    print("4、显示已经点餐内容")
    print("Q/q、完成点餐")

    choice = input("请选择：")

    if choice == "1":
        print("炒菜界面")
        print("1、纸包鱼")
        print("U/u、返回点餐主界面继续点餐")
        print("Q/q、完成点餐")

        dish_choice = input("请选择菜品：")

        if dish_choice == "1":
            print("炒菜：纸包鱼")
            print("1、微辣")
            print("U/u、返回炒菜界面")
            print("Q/q、完成点餐")

            spice_choice = input("请选择辣度：")

            if spice_choice == "1":
                order_list.append("纸包鱼（微辣）")
                print("已点餐：", order_list)

        elif dish_choice == "u" or dish_choice == "U":
            continue

        elif dish_choice == "q" or dish_choice == "Q":
            break

        else:
            print("无效选择，请重新选择！")

    elif choice == "2":
        print("主食界面")
        print("1、牛肉面")
        print("U/u、返回点餐主界面继续点餐")
        print("Q/q、完成点餐")

        food_choice = input("请选择主食：")

        if food_choice == "1":
            print("主食：牛肉面")
            print("1、二细")
            print("2、确定数量")
            print("U/u、返回主食界面")
            print("Q/q、完成点餐")

            beef_noodle_choice = input("请选择牛肉面类型：")

            if beef_noodle_choice == "1":
                order_list.append("牛肉面（二细）")
                print("已点餐：", order_list)

            elif beef_noodle_choice == "2":
                quantity = input("请输入数量：")
                order_list.append("牛肉面（二细）（%s碗）" % quantity)
                print("已点餐：", order_list)

            elif beef_noodle_choice == "u" or beef_noodle_choice == "U":
                continue

            elif beef_noodle_choice == "q" or beef_noodle_choice == "Q":
                break

            else:
                print("无效选择，请重新选择！")

        elif food_choice == "u" or food_choice == "U":
            continue

        elif food_choice == "q" or food_choice == "Q":
            break

        else:
            print("无效选择，请重新选择！")

    elif choice == "4":
        print("已点餐内容")
        for i in range(len(order_list)):
            print("%d、%s" % (i+1, order_list[i]))
        print("U/u、返回点餐主界面继续点餐")
        print("Q/q、完成点餐")

        operation = input("请选择操作：")

        if operation == "u" or operation == "U":
            continue

        elif operation == "q" or operation == "Q":
            break

        else:
            print("无效选择，请重新选择！")

    elif choice == "q" or choice == "Q":
        break

    else:
        print("无效选择，请重新选择！")

这是一个简单的订餐系统代码实现，您可以在此基础上进行修改和扩展。