day15 面向对象作业

import math

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

class Computer:
    def __init__(self, brand, color, memory):
        self.brand = brand
        self.color = color
        self.memory = memory

    def play(self):
        print('play game')

    def write(self):
        print('write code!')

    def watch(self):
        print('watch avi!')


c1 = Computer('联想', 'black', '16G')
# a.方法
print(c1.color)
c1.memory = '32G'
c1.cpu = 'i9-9900k'
del c1.color
print(c1.brand, c1.memory, c1.cpu)
# b.attr方式
print(getattr(c1, 'cpu', 'i7-8700'))
setattr(c1, 'memory', '64G')
setattr(c1, 'VGA', 'TITAN RTX')
delattr(c1, 'brand')
print(c1.cpu, c1.VGA, c1.memory)

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，让他拥有一条狗大黄，然后让小明去遛大黄

class Dog:
    def __init__(self, dogname, color='black', dogage=1):
        self.dogname = dogname
        self.color = color
        self.dogage = dogage

    def shout(self):
        print('汪汪汪！')

class Person:
    def __init__(self, name, dog：Dog=None, age=22):
        self.name = name
        self.age = age
        self.dog = dog

 def stroll(self):
        if self.dog:
            print('%s正在遛%s' % (self.name, self.dog))
        else:
            print('没有狗！遛自己')


p2 = Dog('大黄')
p1 = Person('小明', p2.dog)
p1.stroll()

3.声明一个圆类

import math
class circle:
    def __init__(self, radius):
        self.radius = radius

    def area(self):
        return math.pi * self.radius ** 2

    def peri(self):
        return math.pi * self.radius * 2

4.创建一个学⽣生类:
属性:姓名，年龄，学号
方法:答到，展示学生信息

class student:
    def __init__(self, name, age=12, id='1001'):
        self.name = name
        self.age = age
        self.id = id

    def answ(self, name):
        print('%s到！' % name)

    def show(self, name, age, id):
        print('姓名：%s，年龄：%d,学号：%s' % (name, age, id))

    def __repr__(self):
        return '姓名：%s，年龄：%d,学号：%s' % (self.name, self.age, self.id)


s1 = student('小明')
s1.answ(s1.name)
s1.show(s1.name, s1.age, s1.id)

5.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, 求班上学生的平均年龄

class CLASS:
    students = []

    def __init__(self, clasnum):
        self.clasnum = clasnum

    def addstu(self, student):
        self.students.append(student.__dict__)

    def del_stu(self, student):
        self.students.__delattr__(student)

    def call(self, student):
        print(student)

    def aveg(self, students):
        sum = 0
        for i in students:
            sum += i['age']
        return sum / len(students)


s2 = student('小u', 13)
s3 = student('小hong', 14)
s4 = student('gang', 32)
C1 = CLASS(1)
C1.addstu(s2)
C1.addstu(s3)
C1.addstu(s4)
C1.call(s2.name)
print(C1.aveg(C1.students))