example4_using_async.cpp

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

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

int main() {
    std::cout << "Starting async operation..." << std::endl;
    
    std::future<int> result = std::async(std::launch::async, compute_value);
    
    std::cout << "Doing other work..." << std::endl;
    std::this_thread::sleep_for(std::chrono::seconds(1));
    
    std::cout << "Result is: " << result.get() << std::endl;
    
    return 0;
}