【有彩蛋】关于“真伪随机数”的思考,及原创的一个Visual Basic的小程序



  • 要生成一个“真”随机数,电脑会检测电脑外部发生的某种物理现象。比如说,电脑可以测量某个原子的放射性衰变。根据量子理论,原子衰变是随机而不可测的,所以这就是宇宙中的“纯粹”随机性。


  • 伪随机数这个概念是相对于“真”随机数而言。电脑通过发送种子数值,运用算法产生某个看起来像随机数的数字,但是实际上这个数字是可以预测的。因为电脑没有从环境中收集到任何随机信息。




我把目光放在VB(Visual Basic)的Rnd()函数。






Private Sub Command1_Click()
Dim cs As Long
cs = Val(Text1.Text)
Dim bl(1000000) As Long
For i = 1 To cs
bl(i) = Rnd
List1.AddItem bl(i)
If bl(i) = 0 Then l = l + 1
If bl(i) = 1 Then y = y + 1
Next i
Text2.Text = Str(l)
Text3.Text = Str(y)
List2.AddItem Str(l / cs)
List2.AddItem Str(y / cs)
End Sub















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《【有彩蛋】关于“真伪随机数”的思考,及原创的一个Visual Basic的小程序》有96,110个想法

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