Day11作业-面向对象相关

1.声明一个电脑类：
属性：品牌、颜色、内存大小
方法：打游戏、写代码、看视频
a.创建电脑类的对象，然后通过对象点的方式获取、修改、添加和删除它的属性
b.通过attr相关方法去获取、修改、添加和删除它的属性

class Computer:
    def __init__(self, brand='', color='', memory=''):
        self.brand = brand
        self.color = color
        self.memory = memory
    def play(self):
        print('打游戏')
    def wriht(self):
        print('写代码')
    def watch(self):
        print('看视频')
computer = Computer('华硕', '黑色', '4GB')
# 查
print(computer.brand, computer.color, computer.memory)
print(getattr(computer, 'brand'), getattr(computer, 'color'), getattr(computer, 'memory'))
# 改
computer.color = '银色'
setattr(computer, 'memory', '8GB')
print(computer.brand, computer.color, computer.memory)
# 添
computer.inch = 15
setattr(computer, 'CPU', 'CORE i5')
print(computer.inch, computer.CPU)
# 删
del computer.inch
computer.__delattr__('CPU')
try:
    print(computer.inch, computer.CPU)
except:
    print('已删除')

华硕 黑色 4GB
华硕 黑色 4GB
华硕 银色 8GB
15 CORE i5
已删除

Process finished with exit code 0

2.声明一个人的类和狗的类：
狗的属性：名字、颜色、年龄 狗的方法：叫唤
人的属性：名字、年龄、狗 人的方法：遛狗
a.创建人的对象小明，让他拥有一条大黄狗，然后让小明去遛大黄

class Person:
    def __init__(self, name='', age='', dog=''):
        self.name = name
        self.age = age
        self.dog = dog
    def doing(self, thing='遛狗'):
        print('%s在%s' % (self.name, thing))

class Dog:
    def __init__(self, name='', color='', age=''):
        self.name = name
        self.color = color
        self.age = age
    def doing(self, thing='叫唤'):
        print('%s在%s' % (self.name, thing))

person = Person('小明')
dog = Dog('大黄')
person.doing()
dog.doing()

小明在遛狗
大黄在叫唤

Process finished with exit code 0

3.声明一个矩形类：
属性：长、宽 方法：计算周长和面积
a.创建不同的矩形，并且打印其周长和面积

class Rect:
    def __init__(self, long=0, wide=0):
        self.long = long
        self.wide = wide
    def rect(self):
        print((self.long + self.wide) * 2)
        print(self.long * self.wide)

rect = Rect(3, 4)
rect.rect()
print('===')
rect1 = Rect(5, 7)
rect1.rect()

14
12
===
24
35

Process finished with exit code 0

4.创建一个学生类：
属性：姓名，年龄，学号 方法：答到，展示学生信息
创建一个班级类：
属性：学生，班级名 方法：添加学生，删除学生，点名

class Student:
    def __init__(self, name='', age='', id=''):
        self.name = name
        self.age = age
        self.id = id
    def answer(self):
        name = input('>>>')
        if name == self.name:
            print('%s已到！' % self.name)
    def stu(self):
        print(self.name, self.age, self.id)

stu = Student('jay')
stu.answer()

>>>jay
jay已到！

Process finished with exit code 0

class Student:
    """学生类"""
    def __init__(self, name='', age=0):
        self.name = name
        self.age = age

    def __str__(self):
        return 'name:%s age:%d' % (self.name, self.age)

class Class:
    """班级类"""
    def __init__(self, name='', students=[]):
        self.class_name = name
        self.students = students

    def add_stu(self):
        name = input('姓名：')
        age = input('年龄：')
        # 根据输入的信息创建学生对象
        stu = Student(name, int(age))
        # 添加学生
        self.students.append(stu)

    def del_stu(self):
        name = input('姓名：')
        for n in self.students:
            if n.name == name:
                self.students.remove(n)

5.写一个类，封装所有和数字运算相关的功能（包含常用功能和常用值，例如：pi，e等）

class Count:
    def __init__(self, x=0, y=0):
        self.x = x
        self.y = y
    def sum1(self):
        print(self.x + self.y)
    def les(self):
        print(self.x - self.y)

num = Count(5, 3)
num.sum1()
num.les()

8
2

Process finished with exit code 0