gb_big5
gb_big5 gb_big5_tab[BIG5MAX] = {
gb_big5 *ptr, key;
ptr = (gb_big5*) bsearch(&key, gb_big5_tab, BIG5MAX, sizeof(gb_big5), gb_big5_comp);
gb_big5 *ptr1 = (gb_big5*) p1, *ptr2 = (gb_big5*) p2;