Dim a(14) As Integer
For i = 1 To 14
a(i) = Int(Rnd() * 90) + 10
ListBox1.Items.Add(a(i))
Next
Dim b(14) As Integer
Dim sum As Integer = 0
For i = 1 To 14
b(i) = ListBox1.Items.Item(i - 1)
sum = sum + b(i)
Next
Dim avg As Double
avg = sum / 14
MsgBox(avg)
我写的可以，你可以把代码贴出来看看
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