this a program which reads records from a file and inserts them into a list.The program performs operations like delete an entry, add an entry, order by a certain key, etc. The program is made using both singly linked list and double linked lists-this is a program which reads records from a file and inserts them into a list.The program performs operations like delete an entry, add an entry, order by a certain key, etc. The program is made using both singly linked list and double linked lists