操作系统课程设计，页面置换算法，包含了先进先出fifo、最近最久未使用lru、还有最佳opt三种算法。代码简单易懂，编译通过。-courses on operating system design, page replacement algorithms, including the FIFO fifo. the most recent time on the use of LRU, the three best opt algorithm. Code straightforward compi