What are C++11 futures and how do they work?

Can you explain what C++11 futures are?

C++11 futures are a way to retrieve values from asynchronous operations. They allow you to get the result of a computation that may not have completed yet.

How do I create a future in C++11?

You can create a future using the std::async function, which runs a function asynchronously and returns a future that represents the result.

What happens if I try to access a future that isn't ready?

If you try to access a future that isn't ready, it will block until the result is available, or throw an exception if the operation failed.

Can futures be used with promises?

Yes, futures are often used with promises. A promise is a way to set a value for a future, allowing you to fulfill the future's value at a later time.