来来来，用Python做一个计算器
之前跟大家说了，我是计算机学院的，那么，我今天就给大家展示一下我的才华吧！！！！
今天，我们要用Python的turtle模块和math模块制作一个简易计算器，好了，不多说了，效果图奉上
是不是很棒棒？好了，现在，我来手把手教大家做这个程序，最后奉上全部源代码。
现在，我们就要做一个超级无敌必不可少的步骤，那就是——是——是——是——打开编辑器。
好了，下一步就是激活模块，代码如下：
import math
import tkinter
然后，就要开始编写代码了，这个代码呢，我们主要属于两个部分：计算器的构建和计算机的运行。
现在呢，我们开始我们的第一部分。
首先，我们需要构建一个探测系统，代码如下：
root = tkinter.Tk()
root.resizable(width=False, height=False)
'''hypeparameter'''
#是否按下了运算符
IS_CALC = False
#存储数字
STORAGE = []
#显示框最多显示多少个字符
MAXSHOWLEN = 18
#当前显示的数字
CurrentShow = tkinter.StringVar()
CurrentShow.set('0')
好了，然后是判断系统
'''按下数字键(0-9)'''
def pressNumber(number):
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() == '0':
CurrentShow.set(number)
else:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + number)
'''按下小数点'''
def pressDP():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if len(CurrentShow.get().split('.')) == 1:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + '.')
'''清零'''
def clearAll():
global STORAGE
global IS_CALC
STORAGE.clear()
IS_CALC = False
CurrentShow.set('0')
'''清除当前显示框内所有数字'''
def clearCurrent():
CurrentShow.set('0')
'''删除显示框内最后一个数字'''
def delOne():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() != '0':
if len(CurrentShow.get()) > 1:
CurrentShow.set(CurrentShow.get()[:-1])
else:
CurrentShow.set('0')
'''计算答案修正'''
def modifyResult(result):
result = str(result)
if len(result) > MAXSHOWLEN:
if len(result.split('.')[0]) > MAXSHOWLEN:
result = 'Overflow'
else:
# 直接舍去不考虑四舍五入问题
result = result[:MAXSHOWLEN]
return result
'''按下运算符'''
def pressOperator(operator):
global STORAGE
global IS_CALC
if operator == '+/-':
if CurrentShow.get().startswith('-'):
CurrentShow.set(CurrentShow.get()[1:])
else:
CurrentShow.set('-'+CurrentShow.get())
elif operator == '1/x':
try:
result = 1 / float(CurrentShow.get())
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'sqrt':
try:
result = math.sqrt(float(CurrentShow.get()))
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MC':
STORAGE.clear()
elif operator == 'MR':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MS':
STORAGE.clear()
STORAGE.append(CurrentShow.get())
elif operator == 'M+':
STORAGE.append(CurrentShow.get())
elif operator == 'M-':
if CurrentShow.get().startswith('-'):
STORAGE.append(CurrentShow.get())
else:
STORAGE.append('-' + CurrentShow.get())
elif operator in ['+', '-', '*', '/', '%']:
STORAGE.append(CurrentShow.get())
STORAGE.append(operator)
IS_CALC = True
elif operator == '=':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
# 除以0的情况
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
STORAGE.clear()
IS_CALC = True
第二部分：
'''Demo'''
def Demo():
root.minsize(320, 420)
root.title('Calculator')
# 布局
# --文本框
label = tkinter.Label(root, textvariable=CurrentShow, bg='black', anchor='e', bd=5, fg='white', font=('楷体', 20))
label.place(x=20, y=50, width=280, height=50)
# --第一行
# ----Memory clear
button1_1 = tkinter.Button(text='MC', bg='#666', bd=2, command=lambda:pressOperator('MC'))
button1_1.place(x=20, y=110, width=50, height=35)
# ----Memory read
button1_2 = tkinter.Button(text='MR', bg='#666', bd=2, command=lambda:pressOperator('MR'))
button1_2.place(x=77.5, y=110, width=50, height=35)
# ----Memory save
button1_3 = tkinter.Button(text='MS', bg='#666', bd=2, command=lambda:pressOperator('MS'))
button1_3.place(x=135, y=110, width=50, height=35)
# ----Memory +
button1_4 = tkinter.Button(text='M+', bg='#666', bd=2, command=lambda:pressOperator('M+'))
button1_4.place(x=192.5, y=110, width=50, height=35)
# ----Memory -
button1_5 = tkinter.Button(text='M-', bg='#666', bd=2, command=lambda:pressOperator('M-'))
button1_5.place(x=250, y=110, width=50, height=35)
# --第二行
# ----删除单个数字
button2_1 = tkinter.Button(text='del', bg='#666', bd=2, command=lambda:delOne())
button2_1.place(x=20, y=155, width=50, height=35)
# ----清除当前显示框内所有数字
button2_2 = tkinter.Button(text='CE', bg='#666', bd=2, command=lambda:clearCurrent())
button2_2.place(x=77.5, y=155, width=50, height=35)
# ----清零(相当于重启)
button2_3 = tkinter.Button(text='C', bg='#666', bd=2, command=lambda:clearAll())
button2_3.place(x=135, y=155, width=50, height=35)
# ----取反
button2_4 = tkinter.Button(text='+/-', bg='#666', bd=2, command=lambda:pressOperator('+/-'))
button2_4.place(x=192.5, y=155, width=50, height=35)
# ----开根号
button2_5 = tkinter.Button(text='sqrt', bg='#666', bd=2, command=lambda:pressOperator('sqrt'))
button2_5.place(x=250, y=155, width=50, height=35)
# --第三行
# ----7
button3_1 = tkinter.Button(text='7', bg='#bbbbbb', bd=2, command=lambda:pressNumber('7'))
button3_1.place(x=20, y=200, width=50, height=35)
# ----8
button3_2 = tkinter.Button(text='8', bg='#bbbbbb', bd=2, command=lambda:pressNumber('8'))
button3_2.place(x=77.5, y=200, width=50, height=35)
# ----9
button3_3 = tkinter.Button(text='9', bg='#bbbbbb', bd=2, command=lambda:pressNumber('9'))
button3_3.place(x=135, y=200, width=50, height=35)
# ----除
button3_4 = tkinter.Button(text='/', bg='#708069', bd=2, command=lambda:pressOperator('/'))
button3_4.place(x=192.5, y=200, width=50, height=35)
# ----取余
button3_5 = tkinter.Button(text='%', bg='#708069', bd=2, command=lambda:pressOperator('%'))
button3_5.place(x=250, y=200, width=50, height=35)
# --第四行
# ----4
button4_1 = tkinter.Button(text='4', bg='#bbbbbb', bd=2, command=lambda:pressNumber('4'))
button4_1.place(x=20, y=245, width=50, height=35)
# ----5
button4_2 = tkinter.Button(text='5', bg='#bbbbbb', bd=2, command=lambda:pressNumber('5'))
button4_2.place(x=77.5, y=245, width=50, height=35)
# ----6
button4_3 = tkinter.Button(text='6', bg='#bbbbbb', bd=2, command=lambda:pressNumber('6'))
button4_3.place(x=135, y=245, width=50, height=35)
# ----乘
button4_4 = tkinter.Button(text='*', bg='#708069', bd=2, command=lambda:pressOperator('*'))
button4_4.place(x=192.5, y=245, width=50, height=35)
# ----取导数
button4_5 = tkinter.Button(text='1/x', bg='#708069', bd=2, command=lambda:pressOperator('1/x'))
button4_5.place(x=250, y=245, width=50, height=35)
# --第五行
# ----3
button5_1 = tkinter.Button(text='3', bg='#bbbbbb', bd=2, command=lambda:pressNumber('3'))
button5_1.place(x=20, y=290, width=50, height=35)
# ----2
button5_2 = tkinter.Button(text='2', bg='#bbbbbb', bd=2, command=lambda:pressNumber('2'))
button5_2.place(x=77.5, y=290, width=50, height=35)
# ----1
button5_3 = tkinter.Button(text='1', bg='#bbbbbb', bd=2, command=lambda:pressNumber('1'))
button5_3.place(x=135, y=290, width=50, height=35)
# ----减
button5_4 = tkinter.Button(text='-', bg='#708069', bd=2, command=lambda:pressOperator('-'))
button5_4.place(x=192.5, y=290, width=50, height=35)
# ----等于
button5_5 = tkinter.Button(text='=', bg='#708069', bd=2, command=lambda:pressOperator('='))
button5_5.place(x=250, y=290, width=50, height=80)
# --第六行
# ----0
button6_1 = tkinter.Button(text='0', bg='#bbbbbb', bd=2, command=lambda:pressNumber('0'))
button6_1.place(x=20, y=335, width=107.5, height=35)
# ----小数点
button6_2 = tkinter.Button(text='.', bg='#bbbbbb', bd=2, command=lambda:pressDP())
button6_2.place(x=135, y=335, width=50, height=35)
# ----加
button6_3 = tkinter.Button(text='+', bg='#708069', bd=2, command=lambda:pressOperator('+'))
button6_3.place(x=192.5, y=335, width=50, height=35)
root.mainloop()
if __name__ == '__main__':
Demo()
好了，一个259行代码的计算器就做好了，另外，这个计算器无需下载任何插件的，界面非常整洁，最后给大家奉上滑稽：
(网友：你这是什么鬼？？？？)
对不起，搞错了哈，重来重来。
最后给大家奉上全部代码：
'''
Function:
tkinter计算器
Author:
Charlie
'''
import math
import tkinter
root = tkinter.Tk()
root.resizable(width=False, height=False)
'''hypeparameter'''
# 是否按下了运算符
IS_CALC = False
# 存储数字
STORAGE = []
# 显示框最多显示多少个字符
MAXSHOWLEN = 18
# 当前显示的数字
CurrentShow = tkinter.StringVar()
CurrentShow.set('0')
'''按下数字键(0-9)'''
def pressNumber(number):
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() == '0':
CurrentShow.set(number)
else:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + number)
'''按下小数点'''
def pressDP():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if len(CurrentShow.get().split('.')) == 1:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + '.')
'''清零'''
def clearAll():
global STORAGE
global IS_CALC
STORAGE.clear()
IS_CALC = False
CurrentShow.set('0')
'''清除当前显示框内所有数字'''
def clearCurrent():
CurrentShow.set('0')
'''删除显示框内最后一个数字'''
def delOne():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() != '0':
if len(CurrentShow.get()) > 1:
CurrentShow.set(CurrentShow.get()[:-1])
else:
CurrentShow.set('0')
'''计算答案修正'''
def modifyResult(result):
result = str(result)
if len(result) > MAXSHOWLEN:
if len(result.split('.')[0]) > MAXSHOWLEN:
result = 'Overflow'
else:
# 直接舍去不考虑四舍五入问题
result = result[:MAXSHOWLEN]
return result
'''按下运算符'''
def pressOperator(operator):
global STORAGE
global IS_CALC
if operator == '+/-':
if CurrentShow.get().startswith('-'):
CurrentShow.set(CurrentShow.get()[1:])
else:
CurrentShow.set('-'+CurrentShow.get())
elif operator == '1/x':
try:
result = 1 / float(CurrentShow.get())
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'sqrt':
try:
result = math.sqrt(float(CurrentShow.get()))
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MC':
STORAGE.clear()
elif operator == 'MR':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MS':
STORAGE.clear()
STORAGE.append(CurrentShow.get())
elif operator == 'M+':
STORAGE.append(CurrentShow.get())
elif operator == 'M-':
if CurrentShow.get().startswith('-'):
STORAGE.append(CurrentShow.get())
else:
STORAGE.append('-' + CurrentShow.get())
elif operator in ['+', '-', '*', '/', '%']:
STORAGE.append(CurrentShow.get())
STORAGE.append(operator)
IS_CALC = True
elif operator == '=':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
# 除以0的情况
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
STORAGE.clear()
IS_CALC = True
'''Demo'''
def Demo():
root.minsize(320, 420)
root.title('Calculator')
# 布局
# --文本框
label = tkinter.Label(root, textvariable=CurrentShow, bg='black', anchor='e', bd=5, fg='white', font=('楷体', 20))
label.place(x=20, y=50, width=280, height=50)
# --第一行
# ----Memory clear
button1_1 = tkinter.Button(text='MC', bg='#666', bd=2, command=lambda:pressOperator('MC'))
button1_1.place(x=20, y=110, width=50, height=35)
# ----Memory read
button1_2 = tkinter.Button(text='MR', bg='#666', bd=2, command=lambda:pressOperator('MR'))
button1_2.place(x=77.5, y=110, width=50, height=35)
# ----Memory save
button1_3 = tkinter.Button(text='MS', bg='#666', bd=2, command=lambda:pressOperator('MS'))
button1_3.place(x=135, y=110, width=50, height=35)
# ----Memory +
button1_4 = tkinter.Button(text='M+', bg='#666', bd=2, command=lambda:pressOperator('M+'))
button1_4.place(x=192.5, y=110, width=50, height=35)
# ----Memory -
button1_5 = tkinter.Button(text='M-', bg='#666', bd=2, command=lambda:pressOperator('M-'))
button1_5.place(x=250, y=110, width=50, height=35)
# --第二行
# ----删除单个数字
button2_1 = tkinter.Button(text='del', bg='#666', bd=2, command=lambda:delOne())
button2_1.place(x=20, y=155, width=50, height=35)
# ----清除当前显示框内所有数字
button2_2 = tkinter.Button(text='CE', bg='#666', bd=2, command=lambda:clearCurrent())
button2_2.place(x=77.5, y=155, width=50, height=35)
# ----清零(相当于重启)
button2_3 = tkinter.Button(text='C', bg='#666', bd=2, command=lambda:clearAll())
button2_3.place(x=135, y=155, width=50, height=35)
# ----取反
button2_4 = tkinter.Button(text='+/-', bg='#666', bd=2, command=lambda:pressOperator('+/-'))
button2_4.place(x=192.5, y=155, width=50, height=35)
# ----开根号
button2_5 = tkinter.Button(text='sqrt', bg='#666', bd=2, command=lambda:pressOperator('sqrt'))
button2_5.place(x=250, y=155, width=50, height=35)
# --第三行
# ----7
button3_1 = tkinter.Button(text='7', bg='#bbbbbb', bd=2, command=lambda:pressNumber('7'))
button3_1.place(x=20, y=200, width=50, height=35)
# ----8
button3_2 = tkinter.Button(text='8', bg='#bbbbbb', bd=2, command=lambda:pressNumber('8'))
button3_2.place(x=77.5, y=200, width=50, height=35)
# ----9
button3_3 = tkinter.Button(text='9', bg='#bbbbbb', bd=2, command=lambda:pressNumber('9'))
button3_3.place(x=135, y=200, width=50, height=35)
# ----除
button3_4 = tkinter.Button(text='/', bg='#708069', bd=2, command=lambda:pressOperator('/'))
button3_4.place(x=192.5, y=200, width=50, height=35)
# ----取余
button3_5 = tkinter.Button(text='%', bg='#708069', bd=2, command=lambda:pressOperator('%'))
button3_5.place(x=250, y=200, width=50, height=35)
# --第四行
# ----4
button4_1 = tkinter.Button(text='4', bg='#bbbbbb', bd=2, command=lambda:pressNumber('4'))
button4_1.place(x=20, y=245, width=50, height=35)
# ----5
button4_2 = tkinter.Button(text='5', bg='#bbbbbb', bd=2, command=lambda:pressNumber('5'))
button4_2.place(x=77.5, y=245, width=50, height=35)
# ----6
button4_3 = tkinter.Button(text='6', bg='#bbbbbb', bd=2, command=lambda:pressNumber('6'))
button4_3.place(x=135, y=245, width=50, height=35)
# ----乘
button4_4 = tkinter.Button(text='*', bg='#708069', bd=2, command=lambda:pressOperator('*'))
button4_4.place(x=192.5, y=245, width=50, height=35)
# ----取导数
button4_5 = tkinter.Button(text='1/x', bg='#708069', bd=2, command=lambda:pressOperator('1/x'))
button4_5.place(x=250, y=245, width=50, height=35)
# --第五行
# ----3
button5_1 = tkinter.Button(text='3', bg='#bbbbbb', bd=2, command=lambda:pressNumber('3'))
button5_1.place(x=20, y=290, width=50, height=35)
# ----2
button5_2 = tkinter.Button(text='2', bg='#bbbbbb', bd=2, command=lambda:pressNumber('2'))
button5_2.place(x=77.5, y=290, width=50, height=35)
# ----1
button5_3 = tkinter.Button(text='1', bg='#bbbbbb', bd=2, command=lambda:pressNumber('1'))
button5_3.place(x=135, y=290, width=50, height=35)
# ----减
button5_4 = tkinter.Button(text='-', bg='#708069', bd=2, command=lambda:pressOperator('-'))
button5_4.place(x=192.5, y=290, width=50, height=35)
# ----等于
button5_5 = tkinter.Button(text='=', bg='#708069', bd=2, command=lambda:pressOperator('='))
button5_5.place(x=250, y=290, width=50, height=80)
# --第六行
# ----0
button6_1 = tkinter.Button(text='0', bg='#bbbbbb', bd=2, command=lambda:pressNumber('0'))
button6_1.place(x=20, y=335, width=107.5, height=35)
# ----小数点
button6_2 = tkinter.Button(text='.', bg='#bbbbbb', bd=2, command=lambda:pressDP())
button6_2.place(x=135, y=335, width=50, height=35)
# ----加
button6_3 = tkinter.Button(text='+', bg='#708069', bd=2, command=lambda:pressOperator('+'))
button6_3.place(x=192.5, y=335, width=50, height=35)
root.mainloop()
if __name__ == '__main__':
Demo()
好了，最后，给个关注呗，不要让我7天的成果在你的收藏里吃灰啊！
