/* hello_multi.c - a multi-threaded hello world program */#include  <stdio.h>#include  <pthread.h>#define	NUM	5main(){	pthread_t t1, t2;		/* two threads */	void	*print_msg(void *);	pthread_create(&t1, NULL, print_msg, (void *)"hello");	pthread_create(&t2, NULL, print_msg, (void *)"world\n");	pthread_join(t1, NULL);	pthread_join(t2, NULL);}void *print_msg(void *m){	char *cp = (char *) m;	int i;	for(i=0 ; i<NUM ; i++){		printf("%s", m);		fflush(stdout);		sleep(1);	}	return NULL;}