[求助]加上循环出现问题
请问各位高手一个问题
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim len1 As Integer
Dim a, c As String
a = Trim(TextBox1.Text)
len1 = Len(a)
For i As Integer = 0 To len1 - 1
c = c & Mid(a, len1 - i, 1)
Label1.Text = c
Next i
End Sub
End Class
没有加for循环时正确但是加上后就出现问题请问该如何改啊
