Question

如何运用Python编写简易计算器

Answer 1

import time
print("计算器")
print("+等于加法模式 -等于减法模式 *等于乘法模式 /等于除法模式")
while 2 > 1:
try:
print("请输入+，-，*或/")
a = input()
if a == "+":
print("请输入第1个加数")
b = input()
print("请输入第2个加数")
c = input()
print("计算中")
time.sleep(0.3)
j = float(b) + float(c)
print("等于"+str(j))
elif a == "-":
print("请输入被减数")
b = input()
print("请输入减数")
c = input()
print("计算中")
time.sleep(0.3)
j = float(b) - float(c)
print("等于"+str(j))
elif a == "*":
print("请输入第1个因数")
b = input()
print("请输入第2个因数")
c = input()
print("计算中")
time.sleep(0.3)
j = float(b) * float(c)
print("等于"+str(j))
elif a == "/":
print("……等于余数模式 .等于小数模式")
print("请输入……或.")
a = input()
if a == ".":
print("请输入被除数")
b = input()
print("请输入除数")
c = input()
print("计算中")
time.sleep(0.3)
j = float(b) / float(c)
print("等于"+str(j))
if c == "0":
print("除数不能为0！")
elif a == "……":
print("请输入被除数")
b = input()
print("请输入除数")
c = input()
j = float(b) // float(c)
e = float(b) % float(c)
print("等于"+str(j)+"……"+str(e))
if c == "0":
print("除数不能为0！")
except Exception as e:
print("您输入的内容有错误")

Answer 2

#!/usr/bin/env python# -*- coding:utf-8 -*-# @Time : 2018/1/22 22:29# @Author : zhouyuyao# @File : daemonCalculator.py# PyCharm 2017.3.2 (Community Edition)# Build #PC-173.4127.16, built on December 19, 2017# JRE: 1.8.0_152-release-1024-b8 amd64# JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o# Windows 10 10.0# Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) # [MSC v.1900 64 bit (AMD64)] on win32def add(string):
total = 0
numbers = []
numbers += string.split("+") for num in numbers:
total += int(num)
print("{0}={1}".format(string,total))def reduce(string):
result = 0
numbers = []
numbers += string.split("-")
result = int(numbers[0])
numbers.pop(0) for num in numbers:
result -= int(num)
print("{0}={1}".format(string,result))def ride(string): # 乘
total = 1
numbers = []
numbers += string.split("*") for num in numbers:
total *= int(num.strip())
print("{0}={1}".format(string,total))def division(string):
result = 0
numbers = []
numbers += string.split("/")
result = int(numbers[0])
numbers.pop(0) for num in numbers:
result /= int(num.strip())
print("{0}={1}".format(string,result))if __name__ =="__main__":
print("###############################")
print("#####欢迎来到计算器工作中心######")
print("###############################")
print("1：加法 (a+b+c+d···)")
print("2：减法 (a-b-c-d···)")
print("3：乘法 (a*b*c*d···)")
print("4：除法 (a/b/c/d···)")
method = input("Please input number(1/2/3/4): ") if method == "1": string = input("请输入您的表达式：") add(string)
elif method == "2": string = input("请输入您的表达式：")
reduce(string)
elif method == "3": string = input("请输入您的表达式：")
ride(string)
elif method == "4": string = input("请输入您的表达式：")
division(string) else:
print("The string you input is error.")