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阅读程序: Option Base 1 Dim arr( )As Integer Private Sub Form_Click( ) Dim i AsInteger,j As Integer ReDim arr(3,2) For i=1 To 3 Forj=1 To 2 arr(i,j)=i*2+j Next j Next i ReDim Preserve arr(3,4) For j=3 To 4 arr(3,j)=j+9 Nextj Print arr(3,2)+arr(3,4) End Sub 程序运行后,单击窗体,输出结果为

单选题
2022-07-10 23:13
A、21
B、13
C、8
D、25
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正确答案
B

试题解析
解析:每次使用ReDim语句都会使原来数组中的值丢失,可以在ReDim后加Preserve参数来保留数组中的数据,但使用Preserve只能改变最后一维的大小,前面几维大小不能改变,而在本题中arr(3,2)始终都未赋值,arr(3,4)=4+9=13,故最后为13。

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