（3）计算并输出下述各种算法在不同内存容量下的命中率。
①先进先出算法FIFO
②最近最少使用算法LRU
③最佳淘汰算法OPT：先淘汰最不常用的页地址
④最少访问页面算法LFU
⑤最近最不经常使用算法NUR
,(3) calculate and output a variety of algorithms in different memory of the percentage of hits. FIFO FIFO ② ① algorithm least recently used algorithm LRU ③ the best out of algorithm OPT: first out of the least frequently used page address ④ at least visit the page algorithm LFU ⑤ recently the least frequently used algorithm NUR