What are copy and move constructors in C++?

Can you explain what copy and move constructors are in C++?

Sure! Copy constructors create a new object as a copy of an existing object, while move constructors transfer resources from one object to another.

When should I use a move constructor instead of a copy constructor?

You should use a move constructor when you want to transfer ownership of resources, which is more efficient than copying.

Can you give me an example of both constructors?

Of course! Here's a simple example:

class MyClass {
public:
    MyClass(const MyClass &other) { /* copy constructor */ }
    MyClass(MyClass &&other) noexcept { /* move constructor */ }
};

What happens if I don't define a move constructor?

If you don't define a move constructor, the compiler will generate a default one, which may not be efficient for resource management.