高级编程 python 第九章作业

9-1 餐馆 ：创建一个名为Restaurant的类，其方法__init__() 设置两个属性：restaurant_name 和cuisine_type 。创建一个名为describe_restaurant() 的方法和一个名为open_restaurant() 的方法，其中前者打印前述两项信息，而后者打印一条消息，指出餐馆正在营业。 根据这个类创建一个名为restaurant 的实例，分别打印其两个属性，再调用前述两个方法。 9-2 三家餐馆 ：根据你为完成练习9-1而编写的类创建三个实例，并对每个实例调用方法describe_restaurant()

源代码

class Restaurant():
def __init__(self,restaurant_name,cuisine_type):
self.restaurant_name = restaurant_name
self.cuisine_type = cuisine_type

def describe_restaurant(self):
print("The restaurant's name is "+self.restaurant_name+".")
print("The cuisine type of it is "+self.cuisine_type+".")

def open_restaurant(self):
print("The restaurant is opening.")

输出结果

9-4 就餐人数 ：在为完成练习9-1而编写的程序中，添加一个名为number_served 的属性，并将其默认值设置为0。根据这个类创建一个名为restaurant的实例；打印有多少人在这家餐馆就餐过，然后修改这个值并再次打印它。添加一个名为set_number_served()的方法，它让你能够设置就餐人数。调用这个方法并向它传递一个值，然后再次打印这个值。 添加一个名为increment_number_served()的方法，它让你能够将就餐人数递增。调用这个方法并向它传递一个这样的值：你认为这家餐馆每天可能接待的就餐人数源代码

class Restaurant():
def __init__(self,restaurant_name,cuisine_type):
self.restaurant_name = restaurant_name
self.cuisine_type = cuisine_type
self.number_served = 0

def describe_restaurant(self):
print("The restaurant's name is "+self.restaurant_name+".")
print("The cuisine type of it is "+self.cuisine_type+".")

def open_restaurant(self):
print("The restaurant is opening.")

def set_number_served(self,number):
self.number_served = number
print("The number of the guest is " + str(self.number_served) + ".")

def increment_number_served(self,number):
self.number_served += number
print("The number of the guest is " + str(self.number_served) + " now.")

restaurant1 = Restaurant('So Good','French')
restaurant1.set_number_served(100)
restaurant1.increment_number_served(5

输出结果

9-6 冰淇淋小店 ：冰淇淋小店是一种特殊的餐馆。编写一个名为IceCreamStand 的类，让它继承你为完成练习9-1或练习9-4而编写的Restaurant类。这两个版本的Restaurant 类都可以，挑选你更喜欢的那个即可。添加一个名为flavors的属性，用于存储一个由各种口味的冰淇淋组成的列表。编写一个显示这些冰淇淋 的方法。创建一个IceCreamStand实例，并调用这个方法。

 源代码

class Restaurant():
def __init__(self,restaurant_name,cuisine_type):
self.restaurant_name = restaurant_name
self.cuisine_type = cuisine_type
self.number_served = 0

def describe_restaurant(self):
print("The restaurant's name is "+self.restaurant_name+".")
print("The cuisine type of it is "+self.cuisine_type+".")

def open_restaurant(self):
print("The restaurant is opening.")

def set_number_served(self,number):
self.number_served = number
print("The number of the guest is " + str(self.number_served) + ".")

def increment_number_served(self,number):
self.number_served += number
print("The number of the guest is " + str(self.number_served) + " now.")

class IceCreamStand(Restaurant):
def __init__(self,restaurant_name,cuisine_type):
super().__init__(restaurant_name,cuisine_type)
self.flavors = []

def add_flavor(self,name):
self.flavors.append(name)

def print_flavor(self):
print("Here are the flavors served in this IceCreamStand")
for flavor in self.flavors:
print(flavor)

restaurant1 = IceCreamStand("Timmy's","hot")
restaurant1.describe_restaurant()
restaurant1.add_flavor("Chocolate")
restaurant1.print_flavor()

输出结果