代码

Dim str() As String = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "+", "-", "*", "/"}
For i As Integer = 1 To str.Length \'洗牌测次数
    Dim rnum1 As Integer = Rand.Next(str.Length)
    Dim rnum2 As Integer = Rand.Next(str.Length)
    Dim temp As String = str(rnum1)
    str(rnum1) = str(rnum2)
    str(rnum2) = temp   
Next
msgbox(String.Join("", str))