python 3

#单个参数
# def aaa():
#     print('陈刚')
# #   aaa()
# if __name__ == '__main__':
#    aaa()


#多个参数
# def aaa(name,age):
#     print(name+'今年'+age+'岁')
# aaa('xiaojiang','18')


#有默认参数放在最后
# def aaa(name,sex,age='18岁'):
#     print(name+'性别'+sex+age)
# aaa('xx','男')


#可变长元组
# def aaa(*name):
#     print(name)
# aaa('老大','老二')


#可变长字典
# def aaa(**where):
# #     print(where)
# # dic1 = {'省份':'上海'}
# # aaa(**dic1)


#可变长元组和可变长字典同时出现
# def aaa(*name,**value):
#     print(name)
#     print(value)
# dic1 = {'name':'老大','sex':'男'}
# dic2 = {'class':3}
# aaa('张三','王五',**dic1,**dic2)


#全局变量不受局部变量的限制
# num = 100
# def aaa():
#     num = 200
#     sum = num + 100
#     print(num)
# aaa()
# print(num)


#全局变量受局部变量的限制
# num = 100
# def aaa():
#     global num       #在函数内部把局部变量，定义为全局变量并覆盖原有的全局变量
#     num = 500
#     sum = num + 500
#     print(sum)
# aaa()
# print(num)


#返回值return
# def aaa():
#     num = 600
#     bbb = num /6
#     return bbb
# print(aaa())   #打印一次结果


# def aaa():
#     num = 600
#     bbb = num /6
#     print(bbb)   #
#     return bbb
# print(aaa())  #打印两次结果

# def aaa():
#     num = 600
#     bbb = num /6
#     print(bbb)
#     return bbb
#     print(bbb)  #用了返回值，该条指令无意义
# print(aaa())

# def aaa():
#     num = 500
#     bbb = num /6
#     return bbb
# def goodstudent():
#     ccc = aaa()          #接收上条指令结果
#     if ccc>80:
#         print('优秀学生')
#     else:
#         print('垃圾')
# goodstudent()

#显示余额
# username = 'admin'
# pwd = '123456'
# def login():
#     username = input('账号:')
#     if username == 'admin':
#         pwd = input('密码:')
#         if pwd == '123456':
#             return ('验证成功')
#         else:
#             return ('密码错误')
#     else:
#         return ('账号错误')
# def select():
#     ccc = login()
#     if ccc == '验证成功':
#         print('你还有：100w!')
#     elif ccc == '密码错误':
#         print('请重新输入密码！')
#     else:
#         print('请重新输入账号！')
# select()