What are some examples of async programming in C++?

Can you explain async programming in C++?

Sure! Async programming in C++ allows you to run tasks concurrently, improving performance. Would you like to see some examples?

Yes, please provide some examples of async functions.

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

#include <future>
#include <iostream>

int compute() {
    // Simulate a long computation
    return 42;
}

int main() {
    auto future = std::async(std::launch::async, compute);
    std::cout << "Result: " << future.get() << std::endl;
}

What about error handling in async functions?

Good question! You can handle exceptions in async functions by wrapping the code in a try-catch block. If an exception occurs, it can be retrieved from the future object.

Can you show me an example of error handling?

Certainly! Here's an example:

#include <future>
#include <iostream>
#include <stdexcept>

int riskyComputation() {
    throw std::runtime_error("Error occurred!");
}

int main() {
    auto future = std::async(std::launch::async, riskyComputation);
    try {
        future.get();
    } catch (const std::exception& e) {
        std::cout << "Caught exception: " << e.what() << std::endl;
    }
}