hsearch
ENTRY *hsearch(ENTRY, ACTION);
ep = hsearch(e, ENTER);
ep = hsearch(e, FIND);
ep = hsearch(e, ENTER);
ep = hsearch(e, ENTER);
ep = hsearch(e, FIND);
ep = hsearch(e, FIND);
ep = hsearch(e, ENTER);
ep = hsearch(e, ENTER);
ep = hsearch(e, FIND);
ep2 = hsearch(e, FIND);
elemp = hsearch(elem, FIND);
hsearch(elem, ENTER);