VB.NET tutorial-Element of circularly linked list


VB.NET OOP example

Element of circularly linked list

Step 1: Define element and operations of the circularly linked list

The circularly linked list element has two parts--data and pointer or link. Therefore, we define the the element of the circularly linked list by using a class that has two members--data and next link.

Circularly linked list in VB.NET

 

'List element class
Class ListNode
  Public val As Integer 'element data
  Public nextlk As ListNode 'next link
  Sub New(ByVal elem As Integer)

   val = elem
   nextlk = Nothing

  End Sub

End Class

The operations of the list are outlined in the abstract Cls class:

 'List operations are outlined here and will be implemented by the

MustInherit Class ClsList
  Public Overridable Sub insert(ByVal val As Integer, ByVal pos As Integer)
  End Sub
  Public Overridable Sub delete(ByVal pos As Integer)
  End Sub
  Public Overridable Function countitem() As Integer
    Return 0
  End Function

  Public Overridable Sub showall()
  End Sub
  Public Overridable Function find(ByVal Val As Integer) As ListNode
     Return Nothing
  End Function
  Public Overridable Function findmin() As ListNode
     Return Nothing
  End Function
  Public Overridable Function findmax() As ListNode
     Return Nothing
  End Function
End Class




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 Jpt .com

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2017-01-09




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