Can you give me examples of futures in C++?

Can you give me examples of futures in C++?

Sure! Futures in C++ are used for asynchronous programming. They allow you to retrieve a value that will be available in the future. Here's a simple example using std::async and std::future.

What does the example look like?

Here's a basic 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;
}

What happens if the task takes too long?

If the task takes too long, you can use std::future::wait_for to specify a timeout. If the task doesn't complete in the given time, you can handle it accordingly.