Chapter 2, Problem 5C

Program Plan Intro

Produce an expected progression

Program plan:

• Declare the header files and namespace.
• Create a class “Progression”,
  • Define the constructor.
  • Declare the protected access specifier.
  • Declare the pure virtual methods.
  • Declare the necessary protected member variables.
• Create a class “AbsValProgression” that extends “Progression”,
  • Declare the public member variables.
  • Define the method “firstValue()” to reset to the first value.
    • Assign the first value to the current value.
    • Assign the sum of first and second to the previous value.
    • Return the current value.
      • Define the method “nextValue()” to advances the next value.
        • Assign the current value to the temporary variable.
        • Check whether the previous value is greater than the current value,
        • • If it is true, assign the difference between the previous and the current value to the current value.
        • Otherwise, subtract the previous value from the current value and assign to the current value.
        • Assign the temporary value to the previous value.
        • Return the current value.
      • Define the constructor “AbsValProgression()”,
        • Initialize the initial values for the first and second values.
• Define the “main()” method,
  • Create array object for “AbsValProgression”.
  • Print the value returned from the method “firstValue()”.
  • Print the value returned from the method “nextValue()”.