Chapter 20.3, Problem 20.4CP

Explanation of Solution

Code for add an element “e” to the end of the list:

The code for add an element “e” to the end of the doubly linked list is given below:

//Create a new node with an element "e"

Node new_node = new Node(e);

//Set next of new node pointing to "null"

new_node.next = null;

//Store the address of new node into next of last node

last.next = new_node;

//Store the address of last node into previous of new node

new_node...