通过页式虚拟存储管理中缺页中断轮转算法的模拟设计，了解虚拟存储技术的特点，掌握页式存储管理的缺页中断轮转法。 计算缺页次数、缺页率、被淘汰的序列。-make a sence of the charasteristic of virtual store skill ,via the simulating design of interrupt cycle arithmetic,and master the missing-page interrupt cycle arithmetic about memory management by pages.calculate missing-page,missing-page-rate,orders eliminited