Chapter 6, Problem 6PE

Program Plan Intro

Program plan:

AlternatingSumElement.java

• Create a class named “AlternatingSumElements”.
  • Create a function named “alternatingSum()” for computing the alternating sum of all elements in an array.
    • Declare a variable “subTotal” and assign the value as “0”.
    • Using the “for” loop, check and compute the alternative sum of all elements.
      • The conditional statement “if” (i % 2 == 0) checks whether “i % 2” is equal to “0” or not
        • If the condition is true, then add the alternative sum of elements and store in the variable “sumTotal”.
        • Else if the condition is false, then subtract the alternative sum of elements and store in the variable “sumTotal”.
    • Returns the subtotal of alternating sum of all elements.
  • Create a main function.
    • Declare and initialize double array values.
    • Call the function “alternatingSum()”and pass the argument “num” to the function for computing the alternating sum of all elements in an array.
    • Print the total of alternating sum elements in an array.