public ErrorCode AddSort(String title, double price)
{
LinkedListNode current = front;
LinkedListNode beforecurrent = front;
LinkedListNode newNode = new LinkedListNode(title, price);
if (front == null)
{
front = new LinkedListNode(title, price);
return(ErrorCode.OK);
}
else
{
while (current.GetNext() != null && Compare(current.GetTitle(), title) < 0)
{
beforecurrent = current;
current = current.GetNext();
}
if (current == front && Compare(current.GetTitle(), title) > 0)
{
newNode.SetNext(front);
front = newNode;
return(ErrorCode.OK);
}
if (Compare(current.GetTitle(), title) > 0)
{
beforecurrent.SetNext(newNode);
newNode.SetNext(current);
return(ErrorCode.OK);
}
if (Compare(current.GetTitle(), title) == 0)
{
return(ErrorCode.DuplicateBook);
}
newNode.SetNext(current.GetNext());
current.SetNext(newNode);
return(ErrorCode.OK);
}
}
public void RemoveAt(String title)
{
LinkedListNode current = front;
LinkedListNode beforecurrent = front;
while (current != null)
{
String currenttitle = current.GetTitle();
if (currenttitle.Equals(title))
{
break;
}
beforecurrent = current;
current = current.GetNext();
}
if (current == front)
{
front = front.GetNext();
}
beforecurrent.SetNext(current.GetNext());
}
// Print out the book info (title, price).
// Indenting this would be nice
public void Print()
{
LinkedListNode current = front;
while (current != null)
{
Console.WriteLine("Title: " + current.GetTitle());
Console.WriteLine("Price: $" + current.GetPrice());
current = current.GetNext();
}
Console.WriteLine();
}
public bool Find(String title)
{
if (front == null)
{
return(false);
}
LinkedListNode current = front;
while (current != null)
{
String currenttitle = current.GetTitle();
if (currenttitle.Equals(title))
{
return(true);
}
current = current.GetNext();
}
return(false);
}