from tkinter import *
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W = 280 #窗口寬度
H = 460 #窗口高度
process_H = 110 #顯示運算過程的標簽高度
result_H = 50 ? #顯示運算結果的標簽高度
msFont = '微軟雅黑' #字體
fontSize = 20 #字體大小
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btnBoderWidth = 0.5 #邊框寬度
btnColor = '#4F4F4F' #按鈕顏色
btnWidth = 70 #按鈕寬度
btnHeight = 60 #按鈕高度
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mainWindows = Tk()
mainWindows.title('計算器')
mainWindows.minsize(W,H)
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str_process = StringVar()
str_process.set("")
str_result = StringVar()
str_result.set("0")
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process = Label(mainWindows,font=(msFont,fontSize),bg='orange',anchor='se',wraplength='280',textvariable=str_process)
process.place(width=W,height=process_H) #顯示運算過程的標簽
result = Label(mainWindows,font=(msFont,fontSize+10),bg='orange',anchor='se',textvariable=str_result)
result.place(y=process_H,width=W,height=result_H) #顯示運算結果的標簽
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button_AC = Button(mainWindows,font=(msFont,fontSize),text='AC',fg='orange',bd=btnBoderWidth,command=lambda :clickAC())
button_AC.place(x=0,y=process_H+result_H,width=btnWidth,height=btnHeight)
button_back = Button(mainWindows,font=(msFont,fontSize),text='←',fg=btnColor,bd=btnBoderWidth,command=lambda :clickBack())
button_back.place(x=btnWidth,y=process_H+result_H,width=btnWidth,height=btnHeight)
button_div = Button(mainWindows,font=(msFont,fontSize),text='÷',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('/'))
button_div.place(x=btnWidth*2,y=process_H+result_H,width=btnWidth,height=btnHeight)
button_mul = Button(mainWindows,font=(msFont,fontSize),text='×',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('*'))
button_mul.place(x=btnWidth*3,y=process_H+result_H,width=btnWidth,height=btnHeight)
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button_7 = Button(mainWindows,font=(msFont,fontSize),text='7',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('7'))
button_7.place(x=0,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight)
button_8 = Button(mainWindows,font=(msFont,fontSize),text='8',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('8'))
button_8.place(x=btnWidth,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight)
button_9 = Button(mainWindows,font=(msFont,fontSize),text='9',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('9'))
button_9.place(x=btnWidth*2,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight)
button_minus = Button(mainWindows,font=(msFont,fontSize),text='-',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('-'))
button_minus.place(x=btnWidth*3,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight)
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button_4 = Button(mainWindows,font=(msFont,fontSize),text='4',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('4'))
button_4.place(x=0,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight)
button_5 = Button(mainWindows,font=(msFont,fontSize),text='5',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('5'))
button_5.place(x=btnWidth,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight)
button_6 = Button(mainWindows,font=(msFont,fontSize),text='6',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('6'))
button_6.place(x=btnWidth*2,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight)
button_add = Button(mainWindows,font=(msFont,fontSize),text='+',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('+'))
button_add.place(x=btnWidth*3,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight)
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button_1 = Button(mainWindows,font=(msFont,fontSize),text='1',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('1'))
button_1.place(x=0,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight)
button_2 = Button(mainWindows,font=(msFont,fontSize),text='2',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('2'))
button_2.place(x=btnWidth,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight)
button_3 = Button(mainWindows,font=(msFont,fontSize),text='3',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('3'))
button_3.place(x=btnWidth*2,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight)
button_equal = Button(mainWindows,font=(msFont,fontSize),text='=',bg='orange',fg=btnColor,bd=btnBoderWidth,command=lambda :clickEqual())
button_equal.place(x=btnWidth*3,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight*2)
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button_percent = Button(mainWindows,font=(msFont,fontSize),text='%',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper("%"))
button_percent.place(x=0,y=process_H+result_H+btnHeight*4,width=btnWidth,height=btnHeight)
button_0 = Button(mainWindows,font=(msFont,fontSize),text='0',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('0'))
button_0.place(x=btnWidth,y=process_H+result_H+btnHeight*4,width=btnWidth,height=btnHeight)
button_point = Button(mainWindows,font=(msFont,fontSize),text='.',fg=btnColor,bd=btnBoderWidth,command=lambda :clickPoint())
button_point.place(x=btnWidth*2,y=process_H+result_H+btnHeight*4,width=btnWidth,height=btnHeight)
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process_list = []
s_result = ""
isNum = [False] #上一位按下的是否是數字
point = [True] #小數點使用情況
def clickNum(num): ?#按下數字
? ? isNum.append(True)
? ? point.append(point[-1]) #按下數字，小數點的標志不變
? ? process_list.append(num)
? ? s_process = "".join(process_list)
? ? str_process.set(s_process)
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def clickOper(sign):#按下運算符
? ? global isNum,point
? ? if isNum[-1]:
? ? ? ? process_list.append(sign)
? ? ? ? isNum.append(False)
? ? ? ? point.append(True) #按下運算符，小數點標志為可以按下小數點
? ? else:
? ? ? ? process_list.pop()
? ? ? ? process_list.append(sign)
? ? s_process = "".join(process_list)
? ? str_process.set(s_process)
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def clickEqual():#按下等于
? ? global s_result
? ? s_process = "".join(process_list)
? ? s_result = eval(s_process)
? ? s_result = str(s_result)[0:11] #結果只顯示11位
? ? str_process.set(s_process)
? ? str_result.set(s_result)
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def clickAC():#按下清除
? ? global s_result,isNum,point
? ? s_result = "0"
? ? isNum = [False] ?#狀態回到初始時候
? ? point = [True]
? ? process_list.clear()
? ? str_result.set(s_result)
? ? str_process.set("")
def clickBack(): #按下退格鍵
? ? global point, isNum
? ? if len(process_list) > 0:
? ? ? ? isNum.pop(-1) #刪除最后一位的狀態
? ? ? ? point.pop(-1)
? ? ? ? process_list.pop()
? ? ? ? s_process = "".join(process_list)
? ? ? ? str_process.set(s_process)
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def clickPoint():#按下小數點
? ? global point,isNum
? ? if isNum[-1] and point[-1]:
? ? ? ? process_list.append(".")
? ? ? ? s_process = "".join(process_list)
? ? ? ? str_process.set(s_process)
? ? ? ? isNum.append(False)
? ? ? ? point.append(False)
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mainWindows.mainloop()