What are futures and promises in C++?

Can you explain what futures and promises are in C++?

Sure! Futures and promises in C++ are used for asynchronous programming, allowing you to retrieve values from operations that may not have completed yet.

How do I create a promise in C++?

You can create a promise using the std::promise class. Here's a simple example: std::promise<int> myPromise;.

What about futures? How do they relate to promises?

Futures are associated with promises. When you create a promise, you can obtain a future using myPromise.get_future(), which allows you to access the value once it's ready.

Can you give me an example of using futures and promises together?

Certainly! Here's a quick example: You create a promise, set its value in a separate thread, and use a future to retrieve that value in the main thread.