What is the usage of unique_ptr in C++?

What is the usage of unique_ptr in C++?

unique_ptr is a smart pointer in C++ that manages the lifetime of a dynamically allocated object. It ensures that the object is deleted when the unique_ptr goes out of scope.

How does unique_ptr differ from raw pointers?

Unlike raw pointers, unique_ptr cannot be copied, only moved. This prevents multiple pointers from managing the same resource, avoiding double deletions.

Can you give me an example of how to use unique_ptr?

Sure! Here's a simple example:

#include <memory>

int main() {
    std::unique_ptr<int> ptr = std::make_unique<int>(10);
    std::cout << *ptr << std::endl; // Outputs: 10
    return 0;
}

What happens if I try to copy a unique_ptr?

If you try to copy a unique_ptr, it will result in a compilation error. You must use std::move to transfer ownership.