RosettaCodeData/Task/Probabilistic-choice/VBScript/probabilistic-choice.vb

33 lines
735 B
VB.net

item = Array("aleph","beth","gimel","daleth","he","waw","zayin","heth")
prob = Array(1/5.0, 1/6.0, 1/7.0, 1/8.0, 1/9.0, 1/10.0, 1/11.0, 1759/27720)
Dim cnt(7)
'Terminate script if sum of probabilities <> 1.
sum = 0
For i = 0 To UBound(prob)
sum = sum + prob(i)
Next
If sum <> 1 Then
WScript.Quit
End If
For trial = 1 To 1000000
r = Rnd(1)
p = 0
For i = 0 To UBound(prob)
p = p + prob(i)
If r < p Then
cnt(i) = cnt(i) + 1
Exit For
End If
Next
Next
WScript.StdOut.Write "item" & vbTab & "actual" & vbTab & vbTab & "theoretical"
WScript.StdOut.WriteLine
For i = 0 To UBound(item)
WScript.StdOut.Write item(i) & vbTab & FormatNumber(cnt(i)/1000000,6) & vbTab & FormatNumber(prob(i),6)
WScript.StdOut.WriteLine
Next