What are the stability characteristics of sorting algorithms in C++?

What are the stability characteristics of sorting algorithms in C++?

In C++, sorting algorithms can be classified as stable or unstable. A stable sorting algorithm maintains the relative order of records with equal keys. Examples of stable sorting algorithms include Merge Sort and Bubble Sort.

Can you give me an example of a stable sorting algorithm?

Sure! Merge Sort is a classic example of a stable sorting algorithm. When two elements have equal keys, their original order is preserved in the sorted output.

What about Quick Sort? Is it stable?

No, Quick Sort is generally considered an unstable sorting algorithm. It can change the relative order of equal elements during the sorting process.

How does the stability of an algorithm affect its performance?

Stability can impact performance in scenarios where the order of equal elements is significant, such as when sorting records with multiple fields. Stable algorithms may require additional memory or processing time to maintain order.