# list1 = [8,4,2,1,23,344,12]
# sum = 0
# for x in list1:
# print('数字的值:', x)
# sum += x
# print('和:%d'%sum)
# num = int(input('请输入你要查找的数字:'))
# if list1.count(num)==0:
# print('数字不存在!')
# else:
# print('存在')
# arrScore =[]
# i = 1
# while i<= 3:
# s = float(input('请录入第%d个人的成绩:'%i))
# i += 1
# arrScore.append(s)
# # 排序
# arrScore.sort()
# print(arrScore)
# users=[['tom1','123'],['tom2','123'],['tom3','123']]
# flag = False #标记变量
# name = input('请输入用户名')
# pwd = input('请输入用密码')
# for u in users:
# if name==u[0] and pwd==u[1]:
# flag= True
# break
# if flag:
# print('登录成功')
# else:
# print('用户名或密码错误')
# def panduan(num_4):
# if num_4%400 ==0 or num_4%4==0 and num_4%100!=0:
# return "为闰年"
# else:
# return "不是闰年"
#
# if __name__ == '__main__':
# nianfen = int(input("请输入年份："))
# print(panduan(nianfen))
# a = '-'
# print(a*40)
# print('欢迎使用用户管理系统')
# print('1.注册新用户')
# print('2.登陆')
# print(a*40)
# name = ''
# pwd = ''
# flag = 'y'
# while flag == 'y':
# num = int(input('请选择菜单：'))
# if num== 1:
# name = input('请输入用户名：')
# if name =='admin':
# print('用户名已经被占用！请重新操作 ')
# continue
# pwd = input('请输入密码 ：')
# if len(pwd)< 6:
# print('密码不能小于六位')
# print('')
# elif num== 2:
# print('***********登陆系统**********')
# name1 = input('请输入用户名：')
# pwd1 = input('请输入密码：')
# if name ==name1 and pwd == pwd1:
# print('登录成功！！！')
# break
# else:
# print('输入有误 ！')
# continue
# flag = input('是否继续（y/n）')
# print('谢谢使用！')