如何在多執行緒 C 應用程式中的執行緒之間有效傳播異常？

<code class="cpp">#include <iostream>
#include <thread>
#include <exception>
#include <stdexcept>

std::exception_ptr* exceptions[MAX_THREADS]; // Array to store exceptions from worker threads

void f(int id)
{
    try
    {
        // Simulated work
        std::this_thread::sleep_for(std::chrono::seconds(1));
        throw std::runtime_error("Exception in thread " + std::to_string(id));
    }
    catch (...)
    {
        exceptions[id] = std::current_exception();
    }
}

int main()
{
    std::thread threads[MAX_THREADS];

    // Start worker threads
    for (int i = 0; i < MAX_THREADS; i++)
    {
        threads[i] = std::thread(f, i);
    }

    // Wait for threads to finish
    for (int i = 0; i < MAX_THREADS; i++)
    {
        threads[i].join();
    }

    // Check for and propagate exceptions
    for (int i = 0; i < MAX_THREADS; i++)
    {
        if (exceptions[i])
        {
            try
            {
                std::rethrow_exception(*exceptions[i]);
            }
            catch (const std::exception& ex)
            {
                std::cerr << "Thread " << i << " exited with exception: " << ex.what() << "\n";
            }
        }
    }

    return 0;
}</code>