VB 麻烦把A矩阵改成下三角型显示,B上三角型显示

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VB 麻烦把A矩阵改成下三角型显示,B上三角型显示
Private Sub Command1_Click()
Dim a(4, 4) As Integer
Dim i As Integer, j As Integer
For i = 1 To 4
For j = 1 To 4
a(i, j) = Int(Rnd * 41 + 30)
Print a(i, j);
Next j
Print
Next i
Print
Dim b(4, 4) As Integer
For i = 1 To 4
For j = 1 To 4
b(i, j) = Int(Rnd * 34 + 101)
Print b(i, j);
Next j
Print
Next i

Private Sub Command1_Click()
Dim a(4,4) As Integer
Dim i As Integer,j As Integer
For i = 1 To 4
For j = i To 4
a(i,j) = Int(Rnd * 41 + 30)
Print a(i,j);
Next j
Print
Next i
Print
Dim b(4,4) As Integer
For i = 1 To 4
For j = 1 To i
b(i,j) = Int(Rnd * 34 + 101)
Print b(i,j);
Next j
Print
Next i
End Sub
或者将程序写成下面的形式,用空格占位,使A的数据输出位置更加直观
Private Sub Command1_Click()
Dim a(4,4) As Integer
Dim i As Integer,j As Integer
For i = 1 To 4
For j = 1 To i - 1 '输出空格使数字在上三角的位置上
Print Spc(4);
Next j
For j = i To 4
a(i,j) = Int(Rnd * 41 + 30)
Print a(i,j);
Next j
Print
Next i
Print
Dim b(4,4) As Integer
For i = 1 To 4
For j = 1 To i
b(i,j) = Int(Rnd * 34 + 101)
Print b(i,j);
Next j
Print
Next i
End Su

VB 麻烦把A矩阵改成下三角型显示,B上三角型显示上三角矩阵和下三角有何区别上三角矩阵属于行阶梯型矩阵吗? 索尼爱立信手机信号标志上显示空心三角, 任何n阶矩阵是一组三角矩阵（包括上三角矩阵和下三角矩阵）的乘积上三角矩阵或者下三角矩阵求逆矩阵时有简便方法吗? 为什么上三角矩阵和下三角矩阵的特征值就是矩阵对角线上的元素? 如何把一个二维数组转化为上三角矩阵和下三角矩阵上三角矩阵主对角线值即为其特征值吗?下三角矩阵呢? 数据结构中什么叫下三角矩阵和上三角矩阵? 矩阵A可分解为正交阵*上三角矩阵,也可分解为另一个正交阵*下三角矩阵,请问这两个正交阵的关系是什么塑料杯三角里显示58什么意思