Python编程作业五：面向对象编程

class Student:
    def __init__(self, sno, name, birthday, score):
        self.no = sno
        self.name = name
        self.__birthday = birthday  # 私有属性
        self.score = score

    def __str__(self):
        return '\n学号:' + self.no + '\n姓名:' + self.name + '\n生日:' + self.__birthday + '\n成绩:' + str(self.score)

    def __lt__(self, other):
        if self.score < other.score:
            return True
        else:
            return False

    def __eq__(self, other):
        if self.__birthday == other.__birthday:
            return True
        else:
            return False

stud1 = Student('1001', '李刚', '1999-06-19', 89)
print(stud1)
stud2 = Student('1002', '王强', '2001-03-5', 79)
print(stud2)
stud3 = Student('1002', '张勇', '2001-03-5', 93)
print(stud3)

def compare_score(s1, s2):
    if s1 < s2:
        print(s1.name, '的成绩低于', s2.name, sep='')
    else:
        print(s1.name, '的成绩不低于', s2.name, sep='')

def compare_birthday(s1, s2):
    if s1 == s2:
        print(s1.name, '与', s2.name, '是同一天出生', sep='')
    else:
        print(s1.name, '与', s2.name, '不是同一天出生', sep='')

print()
compare_score(stud1, stud2)
compare_birthday(stud1, stud2)
compare_score(stud2, stud3)
compare_birthday(stud2, stud3)

class Reader:
    __counts=0    #私有类变量
    def __init__(self, name, dept):
        Reader.__counts+=1
        self.rid=str(Reader.__counts)
        self.name=name
        self.dept=dept
        print('你是第{}位读者'.format(Reader.__counts))

    def __str__(self):
        return "读者的信息---编号:"+self.rid+",姓名:"+self.name+",所在部门:"+self.dept

    def logout(self):
        if Reader.__counts>0:
            Reader.__counts-=1

    @classmethod
    def reader_count(cls):
        return cls.__counts

class TeaReader(Reader):
    tNum=0
    max_borrow=20
    def __init__(self,name,dept):
        super().__init__(name,dept)
        TeaReader.tNum+=1
        self.rid='t'+str(TeaReader.tNum)
        print(self)

    def __str__(self):
        return super().__str__()

    def logout(self):
        super().logout()
        if TeaReader.tNum>0:
            TeaReader.tNum-=1
            print("注销教师读者："+self.rid)

    @classmethod
    def get_max_borrow(cls):
        return cls.max_borrow

class StuReader(Reader):
    sNum=0
    max_borrow=10
    def __init__(self,name,dept):
        super().__init__(name,dept)
        StuReader.sNum+=1
        self.rid='s'+str(StuReader.sNum)
        print(self)

    def __str__(self):
        return super().__str__()

    def logout(self):
        super().logout()
        if StuReader.sNum>0:
            StuReader.sNum-=1
            print("注销学生读者："+self.rid)

    @classmethod
    def get_max_borrow(cls):
        return cls.max_borrow

t1=TeaReader('张辉','中文')
t2=TeaReader("李想",'英语')
s1=StuReader('张三','机械')
s2=StuReader('赵六','海洋')
print("教师读者最大借阅数：{}".format(TeaReader.get_max_borrow()))
print("学生读者最大借阅数：{}".format(StuReader.get_max_borrow()))
print("当前读者总人数：{}".format(Reader.reader_count()))
s2.logout()
print("当前教师读者总人数：{}".format(TeaReader.tNum))
print("当前学生读者总人数：{}".format(StuReader.sNum))
print("当前读者总人数：{}".format(Reader.reader_count()))