該計算器使用Python tkinter模塊開發
效果如下圖
1 import tkinter #導入tkinter模塊 2 3 root = tkinter.Tk() 4 root.minsize(280,500) 5 root.title('李蛟龍的計算器') 6 7 8 #1.界面布局 9 #顯示面板 10 result = tkinter.StringVar() 11 result.set(0) #顯示面板顯示結果1，用於顯示默認數字0 12 result2 = tkinter.StringVar() #顯示面板顯示結果2，用於顯示計算過程 13 result2.set('') 14 #顯示版 15 label = tkinter.Label(root,font = ('微軟雅黑',20),bg = '#EEE9E9',bd ='9',fg = '#828282',anchor = 'se',textvariable = result2) 16 label.place(width = 280,height = 170) 17 label2 = tkinter.Label(root,font = ('微軟雅黑',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 #數字鍵按鈕 24 25 btn7 = tkinter.Button(root,text = '7',font = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',20),fg = ('#4F4F4F'),bd = 0.5,command = lambda : pressNum('0')) 46 btn0.place(x = 70,y = 450,width = 70,height = 55) 47 48 49 #運算符號按鈕 50 btnac = tkinter.Button(root,text = 'AC',bd = 0.5,font = ('黑體',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 = ('微軟雅黑',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 #操作函數 73 lists = [] #設置一個變量 保存運算數字和符號的列表 74 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 75 isPressNum = False 76 #數字函數 77 def pressNum(num): #設置一個數字函數 判斷是否按下數字 並獲取數字將數字寫在顯示版上 78 global lists #全局化lists和按鈕狀態isPressSign 79 global isPressSign 80 if isPressSign == False: 81 pass 82 else: #重新將運算符號狀態設置為否 83 result.set(0) 84 isPressSign = False 85 86 #判斷界面的數字是否為0 87 oldnum = result.get() #第一步 88 if oldnum =='0': #如過界面上數字為0 則獲取按下的數字 89 result.set(num) 90 else: #如果界面上的而數字不是0 則鏈接上新按下的數字 91 newnum = oldnum + num 92 result.set(newnum) #將按下的數字寫到面板中 93 94 95 96 97 98 99 100 101 #運算函數 102 def pressCompute(sign): 103 global lists 104 global isPressSign 105 num = result.get() #獲取界面數字 106 lists.append(num) #保存界面獲取的數字到列表中 107 108 lists.append(sign) #講按下的運算符號保存到列表中 109 isPressSign = True 110 111 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0 112 lists.clear() 113 result.set(0) 114 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 115 a = num[0:-1] 116 lists.clear() 117 result.set(a) 118 119 120 121 #獲取運算結果函數 122 def pressEqual(): 123 global lists 124 global isPressSign 125 126 127 curnum = result.get() #設置當前數字變量，並獲取添加到列表 128 lists.append(curnum) 129 130 computrStr = ''.join(lists) #講列表內容用join命令將字符串鏈接起來 131 endNum = eval(computrStr) #用eval命令運算字符串中的內容 132 # a = str(endNum) 133 # 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 = 134 # c = b[0:10] #所有的運算結果取9位數 135 result.set(endNum) #講運算結果顯示到屏幕1 136 result2.set(computrStr) #將運算過程顯示到屏幕2 137 lists.clear() #清空列表內容 138 139 140 141 142 root.mainloop()
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因為字數不夠，此處省略一萬字，用#號代替
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