1#include <pthread.h> 2#include <unistd.h> 3 4static void *th(void *v) 5{ 6 sleep(1); 7 pthread_exit(0); 8} 9 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