VB编写软件,实现从键盘输入两个数值和一个运算符(+,-,*,/),显示出运 ...答:Private Sub Command1_Click()Dim n As Integer, x1 As Integer, x2 As Integer Dim s As String, f As String s = Trim(Text1)n = InStr(s, "+")If n = 0 Then n = InStr(s, "-")If n = 0 Then n = InStr(s, "*")If n = 0 Then n = InStr(s, "/")If n = ...