#include <pthread.h>
#include <time.h>

       void *mytest(void *arg)
{
        pthread_detach(pthread_self());

               time_t current;
        struct tm date;
        time(&current);

               while (1) {
                localtime_r(&current, &date);
                printf("OK/n");
        }
}

       int main()
{
        int i = 0;
        pthread_t tid[10];

               for (i = 0; i < 10; i++) {
                pthread_create(&tid[i], NULL, mytest, NULL);
        }

               sleep(1);

               pthread_cancel(tid[0]);
        pthread_cancel(tid[1]);
        pthread_cancel(tid[2]);
        pthread_cancel(tid[3]);

                while (1)
                sleep(100000000);
}