运行效果
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程序代码
Option Explicit
Dim myarray(100) As Integer '定义数组，下标0-100，数组元素为101个
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Private Sub Command1_Click()
Dim low, high, mid, n As Integer
Dim found As Boolean
low = 0
n = 0
high = UBound(myarray)
found = False
mid = CInt((high + low) / 2) '转换为整型，小数部分四舍五入，避免下标出现小数
Do While Not found And (high >= low)
n = n + 1
If CInt(Text1.Text) = myarray(mid) Then ''查找值和当前中间值比较，相等输出
found = True
Label1.Caption = "查询次数：" & n & vbCrLf & _
"查询数值：" & myarray(mid) & vbCrLf & _
"数组下标：" & mid
Exit Do
ElseIf CInt(Text1.Text) < myarray(mid) Then '查找值和当前中间值比较，小了
high = mid - 1
Else '查找值和当前中间值比较，大了
low = mid + 1
End If
mid = CInt((high + low) / 2)
Loop
End Sub
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Private Sub Form_load()
Dim i As Integer
For i = 0 To UBound(myarray) '给数组赋值
myarray(i) = i
Print myarray(i)
Next i
End Sub
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学习心得
1、二分法查找的思想就是：先取中间值作比较，看大了还是小了，大了就往下取数，小了就往上取数。这样逐步缩小查找范围，就不用每个数都去做比较。适用于有序数组，确实能提高计算效率，是一个很不错的思维方式。
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