Imports System
Public Class Test
Public Shared Function first_n_words(s As String, words As Integer) As String
For i As Integer = 0 To s.Length - 1
If s(i) = " " Then
words -= 1
End If
If words = 0 Then
Return s.Substring(0, i)
End If
Next
Return ""
End Function
Public Shared Sub Main()
Dim s As String = "vb.net c# java php c"
Console.WriteLine(first_n_words(s, 3))
End Sub
End Class
' run
'
' vb.net c# java