How does asynchronous programming in C++ compare to other languages?

How does asynchronous programming in C++ compare to JavaScript?

Asynchronous programming in C++ typically uses features like futures and promises, while JavaScript relies on callbacks and async/await syntax. C++ offers more control over threading, but JavaScript is often simpler for web applications.

What are the main advantages of using async in C++?

The main advantages include improved performance through non-blocking operations, better resource management, and the ability to handle multiple tasks concurrently without freezing the application.

Can you give an example of async code in C++?

Sure! Here's a simple example using std::async:

#include <iostream>
#include <future>

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::cout << "Result: " << result.get() << std::endl;
}

How does error handling work in async C++?

Error handling in async C++ can be done using exceptions. If an exception occurs in the asynchronous task, it can be caught when calling get() on the future, allowing you to handle errors gracefully.