#include  <stdio.h>
#include <unistd.h>
#include  <pthread.h>

#define  NUM  5

int main()
{
  pthread_t t1, t2;    /* dwa watki */

  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);
  return 0;
}
void *print_msg(void *m)
{
  char *cp = (char *) m;
  int i;
  for(i=0 ; i<NUM ; i++){
    printf("%s", cp);
    fflush(stdout);
    sleep(1);
  }
  return NULL;
}