#include <iostream>
#include <pthread.h>

void *quien_soy(void *)
{
    std::cout << pthread_self() << ": hola!\n";
    return NULL; // pthread_exit(NULL);
}

int main()
{
    pthread_t id;
    pthread_create(&id, NULL, quien_soy, NULL);
    pthread_join(id, NULL);
}