What are the differences between unique_ptr and raw pointers in C++11?

What are the differences between unique_ptr and raw pointers in C++11?

In C++11, unique_ptr is a smart pointer that manages the lifetime of an object, ensuring it is deleted when no longer needed, while raw pointers do not manage memory automatically.

Can you explain how unique_ptr helps prevent memory leaks?

Certainly! unique_ptr automatically deletes the associated object when it goes out of scope, which helps prevent memory leaks that can occur with raw pointers if you forget to delete them.

Are there any performance differences between using unique_ptr and raw pointers?

Generally, unique_ptr has a slight overhead due to its management features, but this is often negligible compared to the safety and convenience it provides.

When should I prefer using unique_ptr over raw pointers?

You should prefer unique_ptr when you want to ensure proper memory management and ownership semantics, especially in complex applications.

Can unique_ptr be used with arrays?

Yes, C++11 introduced unique_ptr with a custom deleter for arrays, allowing you to manage dynamic arrays safely.