下面程序段实现单击命令按钮Command1时输出如下结果: 1 -1 -1 1 1 -1 1 1 1 该程序不完整,请填空。 Private Sub Command1_Click() Dim X(3,3) For I=1 to 3 For J=1 To 3 If (14) Then X(I,J)=1 End If IfI<J Then X(I,J)=-1 End If Next J Next I For I=1 To 3 For J=1 To 3 Print X(I,J) Next J Print Next I End Sub