What are constructors in C++ and how do I use std::unique_ptr?

What are constructors in C++?

Constructors are special member functions that initialize objects in C++. They have the same name as the class and no return type.

Can you explain how to use std::unique_ptr?

Sure! std::unique_ptr is a smart pointer that manages the lifetime of an object. It ensures that the object is deleted when the unique_ptr goes out of scope.

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

The main advantages are automatic memory management, prevention of memory leaks, and ensuring that there is only one owner of the resource.

Can you show me a simple example of using std::unique_ptr with a constructor?

Absolutely! Here's a simple example:

#include <iostream>
#include <memory>

class MyClass {
public:
    MyClass() { std::cout << "Constructor called!" << std::endl; }
};

int main() {
    std::unique_ptr<MyClass> ptr = std::make_unique<MyClass>();
    return 0;
}

This code creates a unique_ptr that manages an instance of MyClass.