该计算器使用Python tkinter模块开发
效果如下图
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 = False
76 #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 global isPressSign
80 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 = False
85
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 + num
92 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 def pressCompute(sign):
103 global lists
104 global isPressSign
105 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 = True
110
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 def pressEqual():
123 global lists
124 global isPressSign
125
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()
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因为字数不够，此处省略一万字，用#号代替
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