编写如下程序： Private Sub Command1_Click() Dim a(10) As String s = "123456" n = Len(s) For k = 1 To n a(k) = Mid(s,

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问题编写如下程序：
Private Sub Command1_Click()
Dim a(10) As String
s = "123456"
n = Len(s)
For k = 1 To n
   a(k) = Mid(s, k, 1)
Next k
For i = 1 To n \ 2
   t = a(i)
   a(i) = a(n - i + 1)
   a(n - i + 1) = t
Next i
For k = 1 To n
   Print a(k);
Next k
End Sub
程序运行后，单击命令按钮Command1，输出结果为

选项 A、654321
B、123456
C、654123
D、123654

答案A

解析第一个For循环从字符串s中提取数字，赋值给数组a的元素。第二个For循环对数组a中的元素实现倒序排列。第三个For循环实现打印。选A。

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本试题收录于：二级VB题库NCRE全国计算机二级分类