第一章 数据与信息 知识点题库

Private Sub Convert_Click()

Dim a(1 To 100) As Integer, temp As Integer

Dim s As String, res As String, n As Integer, r As Integer

res = ""

s=TextB.text

n = Len(s)

For i = 1 To n

a(i) = Val(Mid(s, i, 1))

Next i

t = n \ 4

r = ① 

temp = 0

For i = 1 To r       ‘将最高的r位转换为十六进制

 ② 

Next i

If temp > 9 Then

res = Chr(temp + 55)

ElseIf temp > 0 Then

res = CStr(temp)       ‘Cstr()函数用于将数值转换为字符串，同时删除前导空格

End If

For i = 1 To t          ‘将t组4位二进制转换为十六进制

Temp=0

For j=1 to 4

temp = temp+a(j+r+4*(i-1))*2^(4-j)

Next j

If temp > 9 Then

res = res + Chr(temp + 55)

Else

res = res + CStr(temp)

End If

Next i

TextH.Text = res

End Sub

第①处代码为

第②处代码为