QuickSort is a sorting technique which is based on the divide and conquer algorithms. In this article, I will take you through an implementation of QuickSort with C++ programming language.
Quicksort is an efficient sorting algorithm and belongs to the category of divide and conquer sorting algorithms. It is an unstable sorting algorithm, which means that if two values are the same in an array, the algorithm can still swap them.
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The basic idea of quick sorting is to specify an item in the list as the pivot point. Then go through all of the items on the array, swapping out items that are on the wrong side of the pivot.
In other words, swap elements that are smaller than the pivot but on the right side of the pivot with elements that are larger than the pivot but on the left side of the pivot. Once you have made all the possible permutations, move the pivot to where it belongs in the array.
Now we can ignore the pivot, since it is in position, and repeat the process for the two halves of the list (on either side of the pivot). We repeat this until all the items in the array have been sorted.
QuickSort with C++
Quicksort is based on a divide and conquer algorithm. It efficiently sorts an array by dividing the arrays into smaller arrays and sorting the smaller arrays in turn. Now let’s see how to implement Quicksort with C ++:
The best case of quick sorting occurs when the array is already sorted. For this algorithm, the best case looks like the average case in terms of performance. The average case occurs when the pivot splits the board in half or nearly in half on each pass.
The worst-case happens when the pivot is always the largest or smallest element on each pass in the array. Hope you liked this article on implementing QuickSort with the C++ programming language. Please feel free to ask your valuable questions in the comments section below.