填空题
已知数组A(4,4)，各个元素在运行程序时被赋值并打印，形成四除非方阵。请在______和______处填写所需的内容，使其产生一个转置矩阵(即行列互换)，仍放在数组A中，并打印出来。例如：
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
Private Sub Command1_Click()
Dim s(4,4)
For k=1 To 4
For j=1 To 4
a(k,j) =j
Print a(k,j)；
Next
Print
Next
For k=2 To 4
For j=1 To {{U}}[10] {{/U}}
t=a(j,k)
a(j,k)={{U}} [11] {{/U}}
a(k,j)=t
Next
Next
For k=1 To 4
Print a(k,1);a(k,2);a(k,3);a(k,4)
Next
End Sub