Python代码：
# Chapter 9 homework by szh 2018.4.2
from random import randint
class Restaurant():
def __init__(self, restaurant_name, cuisine_type, number_served = 0):
self.restaurant_name = restaurant_name
self.cuisine_type = cuisine_type
self.number_served = number_served
def describe_restaurant(self):
print("restaurant name: ", self.restaurant_name)
print("cuisine type: ", self.cuisine_type)
def open_restaurant(self):
print(self.restaurant_name, " is open.")
def set_number_served(self, value):
self.number_served = value
def increment_number_served(self, value):
self.number_served += value;
print("\n9.1")
res1 = Restaurant("MacDonald", "Fast Food")
print(res1.restaurant_name, res1.cuisine_type)
res1.describe_restaurant()
res1.open_restaurant()
print("\n9.2")
res2 = Restaurant("KFC", "Fast Food")
res3 = Restaurant("Starbucks", "Drinks")
res1.describe_restaurant()
res2.describe_restaurant()
res3.describe_restaurant()
print("\n9.3")
class User():
def __init__(self, first_name, last_name, gender = None, age = None):
self.first_name = first_name
self.last_name = last_name
self.gender = gender
self.age = age
self.login_attempts = 0
def describe_user(self):
print("first name: ", self.first_name)
print("last name: ", self.last_name)
if self.gender:
print("gender: ", self.gender)
if self.age:
print("age: ", self.age)
def greet_user(self):
print("Hello, " + self.first_name + " " + self.last_name)
def increment_login_attempts(self):
self.login_attempts += 1
def reset_login_attempts(self):
self.login_attempts = 0
p1 = User("Alien", "Turing", "male")
p2 = User("Donson", "Jack", "male", 20)
p3 = User("Alien", "Pandora")
p1.describe_user()
p2.describe_user()
p3.describe_user()
p1.greet_user()
p2.greet_user()
p3.greet_user()
print("\n9.4")
res1.set_number_served(5)
print(res1.number_served)
res1.increment_number_served(6)
print(res1.number_served)
print("\n9.5")
for i in range(0, 5):
p1.increment_login_attempts()
print(p1.login_attempts)
p1.reset_login_attempts()
print(p1.login_attempts)
print("\n9.6")
class IceCreamStand(Restaurant):
def __init__(self, restaurant_name, cuisine_type, number_served = 0, *flavors):
super().__init__(restaurant_name, cuisine_type, number_served)
self.flavors = flavors
def showIceCream(self):
for iceCream in self.flavors:
print(iceCream)
I = IceCreamStand('AAA', 'BBB', 1, ['A', 'B', 'C'])
I.showIceCream()
print("\n9.7")
class Admin(User):
def __init__(self, first_name, last_name, gender = None, age = None, *privileges):
super().__init__(first_name, last_name, gender, age)
self.privileges = privileges
def show_privileges(self):
for privilege in self.privileges:
print(privilege)
A1 = Admin("Donson", "Jack", "male", 20, ['can add post', 'can delete post', 'can ban user'])
A1.show_privileges()
print("\n9.14")
class Die():
def __init__(self, side = 6):
self.side = side
def roll_die(self):
print(randint(1, self.side))
print("6 sides die")
die_6 = Die()
for i in range(6):
die_6.roll_die()
print("10 sides die")
die_10 = Die(10)
for i in range(10):
die_10.roll_die()
print("20 sides die")
die_20 = Die(20)
for i in range(10):
die_20.roll_die()
输出结果：
9.1 MacDonald Fast Food restaurant name: MacDonald cuisine type: Fast Food MacDonald is open. 9.2 restaurant name: MacDonald cuisine type: Fast Food restaurant name: KFC cuisine type: Fast Food restaurant name: Starbucks cuisine type: Drinks 9.3 first name: Alien last name: Turing gender: male first name: Donson last name: Jack gender: male age: 20 first name: Alien last name: Pandora Hello, Alien Turing Hello, Donson Jack Hello, Alien Pandora 9.4 5 11 9.5 1 2 3 4 5 0 9.6 ['A', 'B', 'C'] 9.7 ['can add post', 'can delete post', 'can ban user'] 9.14 6 sides die 4 3 4 2 3 3 10 sides die 4 10 2 1 4 6 6 6 1 7 20 sides die 10 10 7 11 13 15 8 9 14 9