题目

某算法程序段如下： Dim s1 As String, s2 As String, ch As String Const code = "@*()^&#" s1 = Text1.Text For i = 1 To Len(s1)     ch = Mid(s1, i, 1)     If ch >= "a" And ch <= "z" Then         t = (Asc(ch) - 65 + i) Mod 7         s2 = Mid(code, t + 1, 1) + s2     Else         s2 = s2 + ch     End If Next i Text2.Text = s2 若 text1 中输入字符“AbCd”，则 text2 中输出的是 （     ） A .  AC^@ B .  ^@AC C .  ^(@& D . A^C@ 答案：B

查看本题答案和解析