程序功能：

1）动态演示四种页面置换策略（OPT，FIFO，LRU，CLOCK）。

2）能够可视化观察每种置换策略的工作工程。

3）能够输入一个数字表示页执行序列的总长度（不小于1000），能够设置进程的总页数，然后随机产生页执行序列。

4）能够输入一个数字设置操作系统分配给进程的页面数。

5）统计每种置换策略在不同输入数据情况下的页面失效数。

6）根据实验结果分析不同置换策略的性能。并在实验报告中画出页面失-Program features: 1) dynamic presentation of four kinds page replacement policy (OPT, FIFO, LRU, CLOCK). 2) be able to visualize observe the work of each replacement policy works. 3) be able to enter a page number indicates the total length of the execution sequence (not less than 1000), the total number of pages the process can be set, and then randomly generated page execution sequence. 4) be able to enter a number to set the operating system the number of pages allocated to the process. 5) Statistical each replacement policies at different input data in case the number of page faults. 6) According to the results of the performance of different replacement policies. And draw the pages in your lab report missing