Online_RandMarkingAlgorithm

代码说明：

  本程序解决的是：模拟类似计算机主、缓存的存储结构，当用户请求某个页面时，若某个页面已在缓存中，则直接从缓存中去取，不会产生失误（即未在缓存中命中），否则，就到主存中去取，代价变大。 本程序采用随机标记算法，即在在线标记算法的基础上，对于替换页面时，采用随机从未标记的缓存项中选出一项进行替换。 代码、文档详尽(Addressed in this program are: analog computer-like main, cache storage structure, when the user requests a page, a page in the cache directly from the cache to fetch, does not produce errors (that is, not in the cache in the hit), otherwise, to the main memory to fetch a consideration of larger. This program uses a random marking algorithm, online marking algorithm based on random never mark the cache entry selected a replacement for the replacement page. Code, documentation detailed)