What is std::shared_ptr in C++?

Can you explain what std::shared_ptr is in C++?

Sure! std::shared_ptr is a smart pointer in C++ that manages the lifetime of an object through reference counting.

How does reference counting work with std::shared_ptr?

Each std::shared_ptr maintains a count of how many shared_ptr instances point to the same object. When a new shared_ptr is created, the count increases, and when a shared_ptr is destroyed, the count decreases. When the count reaches zero, the object is deleted.

What are the advantages of using std::shared_ptr over raw pointers?

Using std::shared_ptr helps prevent memory leaks and dangling pointers, as it automatically manages the memory of the object it points to.

Are there any downsides to using std::shared_ptr?

Yes, std::shared_ptr has some overhead due to reference counting, and it can lead to circular references if not used carefully.