vb中：设有一个二维数组A（5，5）编程计算，所有元素的和

Private Sub Form_Click()
Cls
Randomize
Dim a(5, 5) As Integer
For i = 0 To 5
For j = 0 To 5
a(i, j) = Int(Rnd * 9)
Print a(i, j) & ",";
Sum = Sum + a(i, j)
Next j
Print
Next i
Print "所有元素和为：" & Sum
'////////////
Sum = 0
For i = 0 To 5
Sum = Sum + a(i, 0) + a(i, 5) + a(0, i) + a(5, i)
Next
Sum = Sum - a(0, 0) - a(5, 0) - a(5, 5) - a(0, 5)
Print "所有靠边元素的和:" & Sum
'//////////////////////////////
Sum = 0
For i = 0 To 5
Sum = Sum + a(i, i) + a(i, 5 - i)
Next
Print "两条对角线元素的和为：" & Sum
End Sub

说明,由于"设有一个二维数组A",所以以下程序直接引用数组a,并且认为a数组范围为(1 to 5,1 to 5)
Dim i, j, sum As Integer
sum = 0
For i = 1 To 5
For j = 1 To 5
sum = sum + a(i, j)
Next j
Next i
Print sum