如果要对两个十进制数进行异或运算,可以按以下步骤进行:
① 先将要进行异或运算的两个十进制数分别转换为二进制;
② 对两个二进制数按位进行异或运算;例:(101101)2⊕(111)2=(101010)2
③ 再把步骤②中的运算结果转换为十进制,该十进制数即为运算结果。
小明编写了一个VB程序来模拟上述运算过程,程序功能如下:在文本框Text1和Text2中分别输入要参加异或运算的十进制数,单击计算按钮Command1,程序对输入的两个数进行异或运算,并将运算结果显示在文本框Text3中,程序运行界面如图所示。
(2)实现上述功能的VB程序如下。请在划线处填入合适的代码。
Private Sub Command1_Click()
Dim a As Integer, b As Integer, c As Integer
Dim a1 As String, b1 As String
Dim lena1 As Integer, lenb1 As Integer, i As Integer
Dim result As String
a = Val(Text1.Text)
b = Val(Text2.Text)
If a > b Then
c = a: a = b: b = c
End If
result = ""
a1 = DtoB(a): b1 = DtoB(b)
lena1 = Len(a1): lenb1 = Len(b1)
i = 1
Do While i <= lena1
If Mid(a1, lena1 - i + 1, 1) = Mid(b1, lenb1 - i + 1, 1) Then
result = "0" + result
Else
result = "1" + result
End If
i = i + 1
Loop
result =①_____
Text3.Text = BtoD(result)
End Sub
Public Function DtoB(x As Integer) As String
Dim remainder As String
DtoB = ""
Do While x > 0
remainder = CStr(x Mod 2) '如:CStr(3 Mod 2)的值为"1"
DtoB = remainder + DtoB
②________
Loop
End Function
Public Function BtoD(x As String) As Integer
Dim i As Integer
BtoD = 0
For i = 1 To Len(x)
BtoD =③________+ Val(Mid(x, i, 1))
Next i
End Function

同类型试题

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2


y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

