Dim s As String Dim n As Integer s = InputBox("请输入一个字符串") n = 0 For i = 1 To Len(s) If Mid(s, i, 1) >= "0" Or Mid(s, i, 1) <= "9" Then n = n + 1 End If Next i Print "字符串中有 " & n & " 个数字字符" 上面的功能是输出一个字符串中,数字字符的个数。其中,If Mid(s, i, 1) >= "0" Or Mid(s, i, 1) <= "9" Then 是错的,请选择正确选项()。
A.
Mid(s, i, 1) >= "0" And Mid(s, i, 1) <= "9"
B.
Left(s, i) >= "0" And Left(s, i) <= "9"