1 import tkinter #导入tkinter模块

2

3 root =tkinter.Tk()4 root.minsize(280,500)5 root.title('李蛟龙的计算器')6

7

8 #1.界面布局

9 #显示面板

10 result =tkinter.StringVar()11 result.set(0) #显示面板显示结果1，用于显示默认数字0

12 result2 = tkinter.StringVar() #显示面板显示结果2，用于显示计算过程

13 result2.set('')14 #显示版

15 label = tkinter.Label(root,font = ('微软雅黑',20),bg = '#EEE9E9',bd ='9',fg = '#828282',anchor = 'se',textvariable =result2)16 label.place(width = 280,height = 170)17 label2 = tkinter.Label(root,font = ('微软雅黑',30),bg = '#EEE9E9',bd ='9',fg = 'black',anchor = 'se',textvariable =result)18 label2.place(y = 170,width = 280,height = 60)19

20

21

22

23 #数字键按钮

24

25 btn7 = tkinter.Button(root,text = '7',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('7'))26 btn7.place(x = 0,y = 285,width = 70,height = 55)27 btn8 = tkinter.Button(root,text = '8',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('8'))28 btn8.place(x = 70,y = 285,width = 70,height = 55)29 btn9 = tkinter.Button(root,text = '9',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('9'))30 btn9.place(x = 140,y = 285,width = 70,height = 55)31

32 btn4 = tkinter.Button(root,text = '4',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('4'))33 btn4.place(x = 0,y = 340,width = 70,height = 55)34 btn5 = tkinter.Button(root,text = '5',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('5'))35 btn5.place(x = 70,y = 340,width = 70,height = 55)36 btn6 = tkinter.Button(root,text = '6',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('6'))37 btn6.place(x = 140,y = 340,width = 70,height = 55)38

39 btn1 = tkinter.Button(root,text = '1',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('1'))40 btn1.place(x = 0,y = 395,width = 70,height = 55)41 btn2 = tkinter.Button(root,text = '2',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('2'))42 btn2.place(x = 70,y = 395,width = 70,height = 55)43 btn3 = tkinter.Button(root,text = '3',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('3'))44 btn3.place(x = 140,y = 395,width = 70,height = 55)45 btn0 = tkinter.Button(root,text = '0',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('0'))46 btn0.place(x = 70,y = 450,width = 70,height = 55)47

48

49 #运算符号按钮

50 btnac = tkinter.Button(root,text = 'AC',bd = 0.5,font = ('黑体',20),fg = 'orange',command = lambda :pressCompute('AC'))51 btnac.place(x = 0,y = 230,width = 70,height = 55)52 btnback = tkinter.Button(root,text = '←',font = ('微软雅黑',20),fg = '#4F4F4F',bd = 0.5,command = lambda:pressCompute('b'))53 btnback.place(x = 70,y = 230,width = 70,height = 55)54 btndivi = tkinter.Button(root,text = '÷',font = ('微软雅黑',20),fg = '#4F4F4F',bd = 0.5,command = lambda:pressCompute('/'))55 btndivi.place(x = 140,y = 230,width = 70,height = 55)56 btnmul = tkinter.Button(root,text ='×',font = ('微软雅黑',20),fg = "#4F4F4F",bd = 0.5,command = lambda:pressCompute('*'))57 btnmul.place(x = 210,y = 230,width = 70,height = 55)58 btnsub = tkinter.Button(root,text = '-',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('-'))59 btnsub.place(x = 210,y = 285,width = 70,height = 55)60 btnadd = tkinter.Button(root,text = '+',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('+'))61 btnadd.place(x = 210,y = 340,width = 70,height = 55)62 btnequ = tkinter.Button(root,text = '=',bg = 'orange',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressEqual())63 btnequ.place(x = 210,y = 395,width = 70,height = 110)64 btnper = tkinter.Button(root,text = '%',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('%'))65 btnper.place(x = 0,y = 450,width = 70,height = 55)66 btnpoint = tkinter.Button(root,text = '.',font = ('微软雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda:pressCompute('.'))67 btnpoint.place(x = 140,y = 450,width = 70,height = 55)68

69

70

71

72 #操作函数

73 lists = [] #设置一个变量 保存运算数字和符号的列表

74 isPressSign = False #添加一个判断是否按下运算符号的标志,假设默认没有按下按钮

75 isPressNum =False76 #数字函数

77 def pressNum(num): #设置一个数字函数 判断是否按下数字 并获取数字将数字写在显示版上

78 global lists #全局化lists和按钮状态isPressSign

79 globalisPressSign80 if isPressSign ==False:81 pass

82 else: #重新将运算符号状态设置为否

83 result.set(0)84 isPressSign =False85

86 #判断界面的数字是否为0

87 oldnum = result.get() #第一步

88 if oldnum =='0': #如过界面上数字为0 则获取按下的数字

89 result.set(num)90 else: #如果界面上的而数字不是0 则链接上新按下的数字

91 newnum = oldnum +num92 result.set(newnum) #将按下的数字写到面板中

93

94

95

96

97

98

99

100

101 #运算函数

102 defpressCompute(sign):103 globallists104 globalisPressSign105 num = result.get() #获取界面数字

106 lists.append(num) #保存界面获取的数字到列表中

107

108 lists.append(sign) #讲按下的运算符号保存到列表中

109 isPressSign =True110

111 if sign =='AC': #如果按下的是'AC'按键，则清空列表内容，讲屏幕上的数字键设置为默认数字0

112 lists.clear()113 result.set(0)114 if sign =='b': #如果按下的是退格‘’，则选取当前数字第一位到倒数第二位

115 a = num[0:-1]116 lists.clear()117 result.set(a)118

119

120

121 #获取运算结果函数

122 defpressEqual():123 globallists124 globalisPressSign125

126

127 curnum = result.get() #设置当前数字变量，并获取添加到列表

128 lists.append(curnum)129

130 computrStr = ''.join(lists) #讲列表内容用join命令将字符串链接起来

131 endNum = eval(computrStr) #用eval命令运算字符串中的内容

132 #a = str(endNum)

133 #b = '='+a #给运算结果前添加一个 ‘=’ 显示 不过这样写会有BUG 不能连续运算，这里注释，不要 =

134 #c = b[0:10] #所有的运算结果取9位数

135 result.set(endNum) #讲运算结果显示到屏幕1

136 result2.set(computrStr) #将运算过程显示到屏幕2

137 lists.clear() #清空列表内容

138

139

140

141

142 root.mainloop()