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

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

Unique pointers are smart pointers that manage 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?

Sure! Unique pointers automatically deallocate memory when they go out of scope, which helps prevent memory leaks that can occur with raw pointers.

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 it provides safety that often outweighs this cost.

When should I use raw pointers instead of unique_ptr?

You might use raw pointers when interfacing with legacy code or APIs that require them, or when you need to manage memory manually for performance reasons.

Can unique_ptr be used with arrays?

Yes, you can use unique_ptr with arrays by using std::unique_ptr<Type[]> to manage the array's memory.