VB.NET exercises and solutions: count elements of linked list


Singly linked list

Count elements of singly linked list

Step 3: Count elements of the singly linked list

To count all elements of the linked list, we will need a loop to traverse through the linked list. We will let a ariable (i) of ListElem type to point to the pfirst then moe to its next element and increase the number of item(t) one at a time by using a while loop until the end of the linked list(indicated by null value) is reached.

 

'B.NET code count items in the linked list
Public Oerrides Function countitem() As Integer
 Dim i As ListNode
 Dim t As Integer = 0
 Try

  i = pfirst
 While Not IsNothing(i)
  t = t + 1
  i = i.nextlk

  End While
 Catch Ex As Exception

 End Try

 Return t

End Function



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