Can you provide examples of using futures in C++?

Can you provide examples of using futures in C++?

Sure! In C++, futures are used for asynchronous programming. Here's a simple example using std::async.

What does the std::async function do?

std::async launches a task asynchronously and returns a future that will hold the result of the task.

Can you show me a complete code example?

Absolutely! Here's a complete example:

#include <iostream>
#include <future>
#include <chrono>

int asyncTask() {
    std::this_thread::sleep_for(std::chrono::seconds(2));
    return 42;
}

int main() {
    std::future<int> result = std::async(asyncTask);
    std::cout << "Waiting for result..." << std::endl;
    std::cout << "Result: " << result.get() << std::endl;
    return 0;
}