Re: insert [sorted] a node in a linked list

From:
=?ISO-8859-1?Q?=D6=F6_Tiib?= <ootiib@hot.ee>
Newsgroups:
comp.lang.c++.moderated
Date:
Sun, 10 Mar 2013 15:40:27 -0700 (PDT)
Message-ID:
<8641fb3d-e902-4e45-9e71-c24c42bdf74c@googlegroups.com>
On Sunday, 10 March 2013 09:48:20 UTC+2, alexo wrote:

Il 09/03/2013 15:52, ?????? Tiib ha scritto:

On Friday, 8 March 2013 17:20:30 UTC+2, alexo wrote:

I'd like to insert a node in a linked list in a sorted manner. from
smaller to bigger


Can you tell us the reason why you use linked list for sorted
container? I would likely review such usage as a design defect.


It's for testing my programming skills.
I read in the book "teach yourself C++ in 21 days" that the author did so
in one of his lessons [on appendix E, for the precision].
So I thought I could handle a similar thing with my code. That's it.


Sounds like "drop 50 pounds of weight in 21 days". Can be done but result
might be not that nice.

What I can't figure out is how to do as better as I did,
so I asked you an help. What's wrong with my code?.


Since it is sorted container ... move unsorted inserts like push()
and push_back() to private.

Learn to use debugger.

Lets look at your code:

         while(temp != 0)
         {


Why while is better than if? It does only one cycle

             if( value > temp->getValue() )
             {
                 Node * new_node = new Node(value);
                 insert(new_node, temp);
                 break;


It breaks cycle here ...

             }
             else
             {
                 push(value);
                 break;


.... and here ...

             }
             temp = temp->next;


.... and above line is no way reachable.

         }


So ... the error is somewhere here, you probably wanted to do something
else entirely.

Feels you over-engineered and so got confused in resulting mess
of classes without clear responsibilities. Your list has unneeded
first element (Head). It has no responsibilities. Make the class
Linked_List to take over the unexisting responsibilities of Head.
To have such Head you have split classes Node and List_Element.
Merge them back.

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