#include <cstdio>
#include <thread>

int a = 1;

int main()
{
    thread_local int b = 2;
    std::jthread hebras[2];
    for (int i = 0; i < 2; ++i)
        hebras[i] = std::jthread([&]
        {
            static int c = 3;
            printf("a:%d b:%d c:%d\n", ++a, ++b, ++c);
        });
}