What is the stability of the quick sort algorithm in C++?

What is the stability of the quick sort algorithm in C++?

Quick sort is generally considered an unstable sorting algorithm. This means that it does not preserve the relative order of equal elements.

Why is quick sort considered unstable?

Quick sort's instability arises from its partitioning process, which can reorder equal elements depending on their positions.

Are there any stable versions of quick sort?

Yes, there are stable versions of quick sort, but they typically involve additional space and complexity, such as using a stable partitioning method.

When should I use a stable sort instead of quick sort?

You should use a stable sort when the relative order of equal elements is important, such as when sorting records by multiple fields.