Starting Out with C++: Early Objects
Starting Out with C++: Early Objects
8th Edition
ISBN: 9780133360929
Author: Tony Gaddis, Judy Walters, Godfrey Muganda
Publisher: Addison-Wesley
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Chapter 14, Problem 3PC
Program Plan Intro

QuickSort template

Program Plan:

“main.cpp”

  • Include the required header files.
  • Define the main () function.
    • Declare and define the necessary variables using “for” loop.
    • Prompt and get “10” array elements from the user.
    • Call the method “quicksort ()” to perform the sort operation for the given elements.
    • The sorted values are being displayed to the user using “for” loop.

“Quicksort.h”

  • Define the necessary template function.
  • Define the method definition that compare and performs sort operation for the contents of the array using quick sort.
  • Define the  method “swapVars ()” with two arguments,
    • Assign the temporary variable and perform the necessary swap assignment statements as required.
  • Define the method “partition()” with three arguments,
    • Declare the necessary variables.
    • Calculate the “mid” value from the list of elements.
    • Call the function “swapVars ()” to perform necessary swap operations.
    • Use “for” loop to iterate and validate the values using “if” condition then perform the necessary swaps by calling the function “swapVars ()”.
    • Return the index of the pivot element.
  • Define the method “quicksort ()”,
    • Declare the variable named “pivotpt”.
    • Condition statement that compares the values present at the beginning and at the end.
    • Call the method “partition ()” to partition the list.
    • Call the method “quicksort ()” to sort the first and second sub lists.

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