1 #include <pthread.h> 2 #include <unistd.h> 3 th(void * v)4static void *th(void *v) 5 { 6 sleep(1); 7 pthread_exit(0); 8 } 9 main()10int main() 11 { 12 pthread_t a; 13 14 pthread_create(&a, NULL, th, NULL); 15 pthread_create(&a, NULL, th, NULL); 16 pthread_create(&a, NULL, th, NULL); 17 pthread_create(&a, NULL, th, NULL); 18 19 pthread_exit(0); 20 } 21