quicksort geeksforgeeks

Sure! Here is a step-by-step explanation of the quicksort algorithm in C++:

Step 1: Choose a pivot element from the array. This can be any element, but it is common to choose the first or last element of the array.

Step 2: Partition the array into two sub-arrays: one with elements smaller than the pivot and another with elements greater than the pivot. This step is typically done using two pointers that start at the beginning and end of the array and move towards each other until they find elements that are on the wrong side of the pivot. Once they find such elements, they swap them.

Step 3: Recursively apply steps 1 and 2 to the sub-arrays created in step 2. This means choosing new pivots for each sub-array and repeating the partitioning process until the sub-arrays are sorted.

Step 4: Combine the sorted sub-arrays to get the final sorted array. This step is usually done by concatenating the smaller sub-array, the pivot element, and the larger sub-array.

Step 5: Repeat steps 1 to 4 until the entire array is sorted.

That's it! This is a high-level explanation of the quicksort algorithm in C++. Let me know if you need further assistance!