Chapter 16.3, Problem 28SCP

Explanation of Solution

Sum and average methods

• A method is a block of code which only runs when it is called.
• Data can be passed known as parameters into a method.
• Methods are used to perform certain actions and they are also known as functions.
• The methods sum and average that returns the sum of all values in the list and the average value as a real number is

  //Declare method sum

  public int sum()

  {

  //Declare variables

  int total = 0;

  ListNode current = front;

  //Define while loop

  while (current != null)

  {

  total += current.data;

  current = current...