13518219792
Public Class Form1
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Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim c As Char
c = Trim(TextBox3.Text)
Select Case c
Case "+"
TextBox4.Text = Val(TextBox1.Text) + Val(TextBox2.Text)
Case "-"
TextBox4.Text = Val(TextBox1.Text) - Val(TextBox2.Text)
Case "*"
TextBox4.Text = Val(TextBox1.Text) * Val(TextBox2.Text)
Case "\"
If Val(TextBox2.Text) = 0 Then
MsgBox("分母为0")
Else
TextBox4.Text = Val(TextBox1.Text) \ Val(TextBox2.Text)
End If
Case "/"
If Val(TextBox2.Text) = 0 Then
MsgBox("分母为0")
Else
TextBox4.Text = Val(TextBox1.Text) / Val(TextBox2.Text)
End If
End Select
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
End
End Sub
End Class
刚敲完代码，望采纳
(1)ByVal num as Integer() ,ByVal strInput as string
(2) strInput.Length -1
(3)strScript(i)
(4) Num(j)+1
Function mysqr(ByVal num) as string
Dim retVal as string
if num0 then
num =-num
retVal =Math.Sqrt(num).tostring +"i"
else
retVal =Math.Sqrt(num).tostring
end if
return retVal
End function
1、
For j = 3 To 19 Step 4
m += 1
Next
为循环5次
For i = 1 To 15 Step 4
Next
为循环4次
则总共循环4*5=20,m没循环一次+1，则m=20
2、从下面这段可以看出“*”与“#”是同步的(因为走else时，会继续循环)，有“*”肯定“#”，而输出“*”只有当i=2,4时，则有2次，为*#*#
For i = 1 To 5
If i Mod 2 = 0 Then
Console.Write("*")
Else
ContinueFor
EndIf
Console.Write("#")
Next
在加上最後次输出：Console.WriteLine("$")
结果则为：*#*#$
1.编程求1!+3!+5!+....+n! N由inputbox获取
Function Math(ByVal N As Integer) As Integer
Dim c As Integer = 1
For i = 1 To N
c *= i
Next
Return c
End Function
Dim N As String = InputBox("输入N的值.")
If N = "" Then Return
MessageBox.Show(Math(N))
2.用最简单的方法将个位数和十位数互换,一定要最简单的方法..比如31换成13.
Dim s As String = InputBox("输入一个十位数.")
If s = "" Then Return
MessageBox.Show(StrReverse(s))
在WinForm项目的窗体上添加一个按钮和文本框，然后把下面的代码粘贴上去就可以了。
Public Function lsH(ByVal n As String) As String
Dim s1 As String = ""
Dim s2 As String = ""
Dim i As Integer = 0
Dim j As Integer
If n.Length = 1 Then
Return ("是回文数")
Else
If Tell_JiOu(n.Length) = 1 Then
j = (n.Length + 1) / 2
s1 = Mid(n, 1, j)
Else
j = n.Length / 2 + 1
s1 = Mid(n, 1, j - 1)
End If
For i = n.Length To j Step -1
s2 = s2 + Mid(n, i, 1)
Next
If s1 = s2 Then
Return "是回文数"
Else
Return "不是回文数"
End If
End If
End Function
'判断一个整数的奇偶
Public Function Tell_JiOu(ByVal k As Integer) As Integer
If k Mod 2 = 0 Then
Return 2
Else
Return 1
End If
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Button1.Click
Button.Text = lsH(TextBox1.Text)
End Sub
