文件名称:work4
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随机给出一个页面执行序列，如：1,5,3,4,2,1,3,4,5,7,9,……。要求计算以下几种置换算法的缺页数、缺页率和命中率。
最佳置换算法OPT（Optimal）
先进先出算法FIFO（First In First Out）
最近最少使用算法LRU（Least Recently Used）-Random page gives an execution sequence, such as: 1,5,3,4,2,1,3,4,5,7,9, ....... Require replacement algorithm for computing several missing pages, missing pages rate and hit rate.
optimal replacement algorithm OPT (Optimal)
FIFO algorithm FIFO (First In First Out)
least recently used algorithm LRU (Least Recently Used)
最佳置换算法OPT（Optimal）
先进先出算法FIFO（First In First Out）
最近最少使用算法LRU（Least Recently Used）-Random page gives an execution sequence, such as: 1,5,3,4,2,1,3,4,5,7,9, ....... Require replacement algorithm for computing several missing pages, missing pages rate and hit rate.
optimal replacement algorithm OPT (Optimal)
FIFO algorithm FIFO (First In First Out)
least recently used algorithm LRU (Least Recently Used)
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work4.c