作业：

面向对象人力资源管理系统：

• 能存多个员工信息
  (每个员工的信息有：姓名、年龄、工号、薪资、职位、部门)
• 新员工入职（添加员工）
• 员工离职（删除员工）
• 查看某个员工的信息
• 查询薪资最高的员工
• 查询指定部门中所有员工的平均薪资
• 求整个公司的员工的平均年龄

(可以根据能力改善和添加功能，做到尽量贴近生活）

class   Employee:
    """员工类"""
    def __init__(self):
        self.name = ''
        self.age = ''
        self.work_id = ''
        self.money = ''
        self.position = ''
        self.department = ''

class Manager:
    """公司类"""
    def __init__(self):
        self.c_name = ''
        self.employees = []

    #添加员工
    def add_employee(self,employee):

        self.employees.append(employee)
        print('新员工入职成功')
    #删除员工
    def del_employee(self,employee):

        self.employees.remove(employee)
        print('删除成功')
    #查看某个员工信息
    def find_employee(self):
        message = input('输入你要查找的员工名字：')
        for employee in self.employees[:]:

            if message == employee['name']:
                print(employee['age'],employee['work_id'],employee['money'],employee['position'],employee['department'])

            # print('查无此人')
    #查询薪资最高的员工
    def query_money(self):

        for epployee in self.employees:
            for self.money in epployee:
                money_list = []
                money_list.append(self.money)
                result = sum(money_list)
                print('薪资最高为%s'%result)

    #查询指定部门中所有员工的平均薪资
    def query_pos_money(self,query_pos):
        # query_pos = input('请输入要查询的部门')
        sum = 0
        count = 0
        for epployee in self.employees:
            employee = Employee()
            #把每个员工的信息遍历出来以键值对的形式存入message
            message =employee.__dict__

            if query_pos == message['department']:
                sum += message['money']
                count += 1
            print('该部门平均薪资为%s'%(sum/count))
    #求整个公司的员工的平均年龄
    def avg_age(self):
        sum = 0
        for employee in self.employees:
            employee = Employee()
            message = employee.__dict__
            sum  += message['age']
        print('平均年龄为%s'%(sum/len(self.employees)))
comp1 = Manager()
company = input('请输入公司名：')
comp1.c_name = company
while True:
    print('======================')
    print('    1.新员工入职       ')
    print('    2.员工离职         ')
    print('    3.查看信息        ')
    print('    4.查询薪资最高员工 ')
    print('    5.查询部门平均薪资 ')
    print('    6.员工平均年龄')
    print('======================')
    value = input('请选择：')
    if value == '1':
        while True:
            name = input('请输入员工姓名：')
            age = input('请输入员工年龄：')
            work_id = input('请输入员工工号：')
            money = input('请输入员工薪资：')
            position = input('请输入员工职位：')
            department = input('请输入员工部门：')
            emp = Employee()

            emp.name = name
            emp.age = age
            emp.work_id = work_id
            emp.money = money
            emp.position = position
            emp.department = department
            comp1.add_employee(emp)

            emp = emp.__dict__
            print(' 1.继续添加')
            print('2.返会上一层')
            value2 = input('请选择：')
            if value2 == '1':
                continue
            else:
                break
    if value == '2':
        while True:
            del_name = input('请输入离职员工姓名：')
            comp1.del_employee(del_name)
            print('1.继续删除')
            print('2.返会上一层')
            value3 = input('请选择：')
            if value3  == '1':
                continue
            else:
                break
    if value == '3':
        comp1.find_employee()


    if value =='4':
        comp1.query_money()
    if value == '5':
        query_pos = input('请输入要查询的部门')
        if emp.department == query_pos:

            comp1.query_money(query_pos)

老师讲解版

"""__author__zhangdong__"""
class Staff:
    """员工类"""
    def __init__(self,name,age,salary,job,department):
        self.name = name
        self.age = age
        self.id = ''
        self.salary = salary
        self.job = job
        self.department = department

    def show_info(self):
        print('姓名：%s 工号：%s 部门：%s 职位：%s'%(self.name,self.id,self.department,self.job))


    def __add__(self, other):
        return self.name+other.name

class HrManager:
    """人力资源管理系统"""
    #整个公司的所有的员工
    all_staff = []
    #目前公司已经入职的人数
    __numbers = 0
    _all_department = ['财务部','行政部','研发部','总经办','后勤部']
    @classmethod
    def add_staff(cls):
        name = input('名字：')
        age = input('年龄：')
        salary = input('薪资：')
        while True:
            print('公司部门：',*cls._all_department)
            department = input('部门：')
            if department in cls._all_department:
                break
            else:
                print('部门输入有误')
        job = input('职位：')

        #生成工号
        cls.__numbers += 1
        id  = str(cls.__numbers).rjust(4,'0')

        #创建员工对象
        staff = Staff(name,age,salary,job,department)
        staff.id = id
        #添加员工
        cls.all_staff.append(staff)


    @classmethod
    def del_staff(cls):
        """删除员工"""
        del_name = input('请输入要删除的员姓名')
        flag = False
        for staff in cls.all_staff[:]:
            if staff.name == del_name:
                flag = True
                staff.show_info()
                value = input('是否删除(Y/N):')
                if value == 'Y':
                    cls.all_staff.remove(staff)
                    print('删除成功')
        if not flag:
            print('公司没有该员工')

    @classmethod
    def find_staff(cls):
        find_name = input('请输入要查找的员工姓名：')
        flag = False
        for staff in cls.all_staff[:]:
            if staff.name == find_name:
                flag = True
                staff.show_info()
        if not flag:
            print('公司没有该员工')


    @classmethod
    def get_most_rich(cls):
        if len(cls.all_staff) == 0:
            print('公司还没有员工')
            return
        max_staff = cls.all_staff[0]
        for staff in cls.all_staff:
            if staff.salary>max_staff.salary:
                max_staff = staff
            print('薪资最高是：%s %d'%(max_staff.name,max_staff.salary))
    @classmethod
    def get_aver_rich(cls):
        if len(cls.all_staff) == 0:
            print('公司还没有员工')
            return
        find_department = input('请输入要查找的部门：')
        sum = 0
        count = 1
        for staff in cls.all_staff:
            if  staff.department == find_department:
                sum += staff.salary
                count += 1
        print('该部门平均薪资为%s'%(sum/count))

    @classmethod
    def average_age(cls):
        if len(cls.all_staff) == 0:
            print('公司还没有员工')
        return sum(cls.all_staff)/(len(cls.all_staff))
if __name__ == '__main__':
    HrManager.add_staff()
    HrManager.find_staff()
    HrManager.del_staff()
    HrManager.get_most_rich()
    HrManager.get_aver_rich()
    HrManager.average_age()