#include <iostream>
#include <thread>
 
void job1()
{
    static int data = 42;
    std::cout << data << std::endl;
    ++data;
}
 
void job2()
{
    thread_local static int data = 42;
    std::cout << data << std::endl;
    ++data;
}
 
int main()
{
    std::cout << "Job1" << std::endl;
    for (int i=0; i<10; ++i)
    {
        std::thread t{ job1 };
        t.join();
    }
 
    std::cout << "Job2" << std::endl;
    for (int i=0; i<10; ++i)
    {
        std::thread t{ job2 };
        t.join();
    }
 
    return 0;
}

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