Implement Quick Sort in C programming language

[neilchauhan2]

Implement Quick Sort in C programming language, with well explaining comments. Please make sure the code is easy to understand, since this repo is for beginners. Please create a separate file named, QuickSort.c

[Knee3]

I have created a PR(#32 ), please review it

[riitziiee]

quickSort(arr[], low, high)
{
if (low < high)
{
/* a is partitioning index, arr[a] is now
at right place */
a = partition(arr, low, high);

    quickSort(arr, low, a - 1);  // Before a
    quickSort(arr, a + 1, high); // After a
}

}