MAX_ID_TITLE_LEN
char *t[MAX_ID_TITLE_LEN];
memcpy(t, id_potions[j].title, MAX_ID_TITLE_LEN);
memcpy(id_potions[j].title, id_potions[k].title, MAX_ID_TITLE_LEN);
memcpy(id_potions[k].title, t, MAX_ID_TITLE_LEN);
char title[MAX_ID_TITLE_LEN];
read_string(id_table[i].title, fp, MAX_ID_TITLE_LEN);