LRU页面置换算法模拟,LRU置换算法虽然是一种比较好的算法，但要求系统有较多的支持硬件。为了了解一个进程在内存中的各个页面各有多少时间未被进程访问，以及如何快速地知道哪一页是最近最久未使用的页面.-LRU algorithm simulation replacement pages, the LRU algorithm replacement is a better algorithm, but requires a system with more hardware support. In order to understand a process in the memory of all pages is not how much time each process visit, and how fast to know which pages are the most recent time on the pages.