do循环4种结构的比较
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DO循环四种结构比较
(1) i=inputbox(“请输入I的值”)
do while i<=10
I=i+1
Loop
Print i
程序运行结果___________
(2) i=inputbox(“请输入I的值”)
Do
I=i+1
Loop while i<=10
Print i
程序运行结果___________
(3) i = InputBox(“请输入I的值”)
Do Until i > 10
i = i + 1
Loop
Print i
（4）i = InputBox(“请输入I的值”)
Do
i = i + 1
Loop Until i > 10
Print i
1、Do until-loop 结构
Private Sub Command1_Click()
Dim m As Integer, i As Integer
m = InputBox("请输入一个数：")
i = 2
Do Until (m Mod i = 0) Or i = m - 1
i = i + 1
Loop
If m Mod i = 0 Then
Print m; "不是素数"
Else
Print m; "是素数"
End If
End Sub
2、Do while –loop 结构
Private Sub Command1_Click()
m = InputBox("请输入大于2的任意自然数")
i = 2
Do While (m Mod i <> 0) And (i < m - 1)
i = i + 1
Loop
If m Mod i = 0 Then
Print m; "不是素数"
Else
Print m; "是素数"
End If
End Sub
3、Do –loop while
Private Sub Command1_Click()
Dim m As Integer, i As Integer
m = InputBox("请输入一个数：")
i = 2
Do
If m Mod i <> 0 Or i < m - 1 Then
i = i + 1
End If
Loop While m Mod i <> 0 And i < m - 1 If m Mod i = 0 Then
Print m; "不是素数"
Else
Print m; "是素数"
End If
End Sub
4、Do-loop until Private Sub Command1_Click()
Dim m As Integer, i As Integer
m = InputBox("请输入一个数：")
i = 2
Do
If m Mod i <> 0 Or i < m - 1 Then
i = i + 1
End If
Loop Until m Mod i = 0 Or i >= m - 1
If m Mod i = 0 Then
Print m; "不是素数"
Else
Print m; "是素数" End If
End Sub