import tkinter #導入tkinter模塊root = tkinter.Tk()root.minsize(280,500)root.title('李蛟龍的計算器')#1.界面布局#顯示面板result = tkinter.StringVar()result.set(0)              #顯示面板顯示結果1，用于顯示默認數字0result2 = tkinter.StringVar()      #顯示面板顯示結果2，用于顯示計算過程result2.set('')#顯示版label = tkinter.Label(root,font = ('微軟雅黑',20),bg = '#EEE9E9',bd ='9',fg = '#828282',anchor = 'se',textvariable = result2)label.place(width = 280,height = 170)label2 = tkinter.Label(root,font = ('微軟雅黑',30),bg = '#EEE9E9',bd ='9',fg = 'black',anchor = 'se',textvariable = result)label2.place(y = 170,width = 280,height = 60)#數字鍵按鈕btn7 = tkinter.Button(root,text = '7',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('7'))btn7.place(x = 0,y = 285,width = 70,height = 55)btn8 = tkinter.Button(root,text = '8',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('8'))btn8.place(x = 70,y = 285,width = 70,height = 55)btn9 = tkinter.Button(root,text = '9',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('9'))btn9.place(x = 140,y = 285,width = 70,height = 55)btn4 = tkinter.Button(root,text = '4',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('4'))btn4.place(x = 0,y = 340,width = 70,height = 55)btn5 = tkinter.Button(root,text = '5',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('5'))btn5.place(x = 70,y = 340,width = 70,height = 55)btn6 = tkinter.Button(root,text = '6',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('6'))btn6.place(x = 140,y = 340,width = 70,height = 55)btn1 = tkinter.Button(root,text = '1',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('1'))btn1.place(x = 0,y = 395,width = 70,height = 55)btn2 = tkinter.Button(root,text = '2',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('2'))btn2.place(x = 70,y = 395,width = 70,height = 55)btn3 = tkinter.Button(root,text = '3',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('3'))btn3.place(x = 140,y = 395,width = 70,height = 55)btn0 = tkinter.Button(root,text = '0',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('0'))btn0.place(x = 70,y = 450,width = 70,height = 55)#運算符號按鈕btnac = tkinter.Button(root,text = 'AC',bd = 0.5,font = ('黑體',20),fg = 'orange',command = lambda :pressCompute('AC'))btnac.place(x = 0,y = 230,width = 70,height = 55)btnback = tkinter.Button(root,text = '←',font = ('微軟雅黑',20),fg = '#4F4F4F',bd = 0.5,command = lambda:pressCompute('b'))btnback.place(x = 70,y = 230,width = 70,height = 55)btndivi = tkinter.Button(root,text = '÷',font = ('微軟雅黑',20),fg = '#4F4F4F',bd = 0.5,command = lambda:pressCompute('/'))btndivi.place(x = 140,y = 230,width = 70,height = 55)btnmul = tkinter.Button(root,text ='×',font = ('微軟雅黑',20),fg = "#4F4F4F",bd = 0.5,command = lambda:pressCompute('*'))btnmul.place(x = 210,y = 230,width = 70,height = 55)btnsub = tkinter.Button(root,text = '-',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('-'))btnsub.place(x = 210,y = 285,width = 70,height = 55)btnadd = tkinter.Button(root,text = '+',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('+'))btnadd.place(x = 210,y = 340,width = 70,height = 55)btnequ = tkinter.Button(root,text = '=',bg = 'orange',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda :pressEqual())btnequ.place(x = 210,y = 395,width = 70,height = 110)btnper = tkinter.Button(root,text = '%',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('%'))btnper.place(x = 0,y = 450,width = 70,height = 55)btnpoint = tkinter.Button(root,text = '.',font = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('.'))btnpoint.place(x = 140,y = 450,width = 70,height = 55)#操作函數lists = []              #設置一個變量 保存運算數字和符號的列表isPressSign = False         #添加一個判斷是否按下運算符號的標志,假設默認沒有按下按鈕isPressNum = False#數字函數def pressNum(num):          #設置一個數字函數 判斷是否按下數字 并獲取數字將數字寫在顯示版上  global lists           #全局化lists和按鈕狀態isPressSign  global isPressSign  if isPressSign == False:    pass  else:              #重新將運算符號狀態設置為否    result.set(0)    isPressSign = False  #判斷界面的數字是否為0  oldnum = result.get()       #第一步  if oldnum =='0':         #如過界面上數字為0 則獲取按下的數字    result.set(num)  else:              #如果界面上的而數字不是0 則鏈接上新按下的數字    newnum = oldnum + num    result.set(newnum)      #將按下的數字寫到面板中#運算函數def pressCompute(sign):  global lists  global isPressSign  num = result.get()       #獲取界面數字  lists.append(num)        #保存界面獲取的數字到列表中  lists.append(sign)       #講按下的運算符號保存到列表中  isPressSign = True  if sign =='AC':        #如果按下的是'AC'按鍵，則清空列表內容，講屏幕上的數字鍵設置為默認數字0    lists.clear()    result.set(0)  if sign =='b':         #如果按下的是退格‘'，則選取當前數字第一位到倒數第二位    a = num[0:-1]    lists.clear()    result.set(a)#獲取運算結果函數def pressEqual():  global lists  global isPressSign  curnum = result.get()      #設置當前數字變量，并獲取添加到列表  lists.append(curnum)  computrStr = ''.join(lists)   #講列表內容用join命令將字符串鏈接起來  endNum = eval(computrStr)    #用eval命令運算字符串中的內容#  a = str(endNum)#  b = '='+a            #給運算結果前添加一個 ‘=' 顯示  不過這樣寫會有BUG 不能連續運算，這里注釋，不要 =#  c = b[0:10]           #所有的運算結果取9位數  result.set(endNum)          #講運算結果顯示到屏幕1  result2.set(computrStr)     #將運算過程顯示到屏幕2  lists.clear()          #清空列表內容root.mainloop()