#!/usr/bin/env python
-- coding: utf-8 --
author：albert time:2018/10/24 19:53
def panduan1(s):
try:
nb = float(s)
return True
except ValueError as e:
return False
print (’’‘使用教程：
1.输入数字,按回车按键；2.输入运算符，按回车按键；
3.输入数字，按回车按键；
注意：
1.%：除法求余数 ：求方运算 //：除法求商取整数 ///:求根运算
2.退出密码：1234567890’’’)
while True:
while True:
data_a = input()
if panduan1(data_a) == True:
if type(eval(data_a))==float:
data_a =float(data_a)
elif type(eval(data_a)) == int:
data_a = int(data_a)
break
else:
print(‘未正确输入数字，输入数字后，请按回车，请重新输入第一个数:’)
continue
if data_a == 1234567890:
break
while True:
x = input()
y = x
if x in[’+’, ‘-’, ‘*’, ‘/’,’%’,’’,’//’,’///’,‘1234567890’]:
break
elif x not in[’+’, ‘-’, ‘*’, ‘/’,’%’,’’,’//’,‘1234567890’]:
print(‘请输入运算符，再按回车、请再次输入:’)
continue
if x == ‘1234567890’:
break
while True:
data_b = input()
if panduan1(data_b) == True:
if type(eval(data_b))==float:
data_b =float(data_b)
elif type(eval(data_b)) == int:
data_b = int(data_b)
break
else:
print(‘未正确输入数字，请重新输入数字:’)
continue
if data_b == 1234567890:
break
while True:
if x == ‘+’:
print(data_a, y, data_b, ‘=’, data_a+data_b)
break
if x == ‘-’:
print(data_a, y, data_b, ‘=’, ddata_a-data_b)
break
if x == ‘’:
print(data_a, y, data_b, ‘=’, data_adata_b)
break
if x == ‘/’:
print(data_a, y, data_b, ‘=’, data_a / data_b)
break
if x == ‘//’:
print(data_a, y, data_b, ‘=’, data_a // data_b)
break
if x == '’:
print(data_a, y, data_b, ‘=’, data_a ** data_b)
break
if x == ‘%’:
print(data_a, y, data_b, ‘=’, data_a % data_b)
break
if x == ‘///’:
print(data_a, y, data_b, ‘=’, data_a ** (1/data_b))
break****