题型：单选题 题类：模拟题 难易度：困难
浙江省普通高校招生信息技术选考模拟卷（四）
n = 0 : i =1 : j = 7
Key = Val(Textl.Text)
f = False
Do While i <= j And Not f
m = fix((i + j)/2+0.5)
n = n + 1
If key = d(m) Then
f = True
Elseif key > d(m) then
j = m - 1
Else
i = m + 1
end if
Loop
|
排序前 |
86 |
71 |
5 |
41 |
81 |
79 |
37 |
89 |
|
排序后 |
5 |
37 |
41 |
71 |
79 |
89 |
86 |
81 |
实现上述功能的VB程序如下，但加框处代码有错，请改正。
Const n=8
Dim a(1 To n) As Integer
Private Sub Command1_Click()
Dim i As Integer，j As Integer，k As Integer，t As Integer
Dim flag As Boolean
‘读取一组正整数，存储在数组a中。代码略
For i=1 To n-1
‘(1)
If IsPrime(a(k))Then flag=True Else flag=False
For j=i+1 To n
If IsPrime(a(i))Then
If 
Then ‘(2)
k=j
flag=True
End If
End If
Next j
If k<>i Then
t=a(k)：a(k)=a(i)：a(i)=t
End If
If Not flag Then Exit For ‘Exit For表示退出循环
Next i
‘依次输出排序后的数据。代码略
End Sub
Function IsPrime(m As Integer)As Boolean
‘本函数判断m是否是素数：是素数返问值为True，不是素数返回值为False
‘代码略
End Function
试题篮
