#include "apue.h"#include <pthread.h>pthread_t ntid;voidprintids(const char *s){	pid_t		pid;	pthread_t	tid;	pid = getpid();	tid = pthread_self();	printf("%s pid %u tid %u (0x%x)\n", s, (unsigned int)pid,	  (unsigned int)tid, (unsigned int)tid);}void *thr_fn(void *arg){	printids("new thread: ");	return((void *)0);}intmain(void){	int		err;	err = pthread_create(&ntid, NULL, thr_fn, NULL);	if (err != 0)		err_quit("can't create thread: %s\n", strerror(err));	printids("main thread:");	sleep(1);	exit(0);}