Implemented sort, lengthInteger. Updated compare, Removed initials printf.

Added specifications and some functions complexities.

inset after position p resolved

inser position p 
but bug in a display just after adding 

Now the first number can be deleted. It was an issue regarding the lost of the head attribute of the list.

destruct resolved

... it must be tested when we'll be able to insert at a specific position. Some minor fixes for main and other functions.

Unit tests already done.

display

add_end_list

debug function insert_empty_list and insert_beginning_ist

Modified initialize function header. Insert_beginning_list is still in development.

Set initial loop for user menu

Implementation of the functions is still pending...