caozuoxitong

哈夫曼编码和解码 LRU算法模拟 银行家算法模拟 页面地址重定位模拟 进程调度模拟 FIFO算法模拟(Huffman encoding and decoding algorithm simulates LRU algorithm simulation banker page address relocation simulation process scheduling simulation algorithm FIFO simulation)

一个虚拟DOS操作界面的小系统，一共有9条命令，可以在里面增加命令实现更多功能。(A virtual DOS interface small system, a total of 9 orders, which increased in order to achieve more.)

1）设计一程序，由一个进程创建三个子进程，三个子进程一个是生产者进程，两个是消费者进程。 2）父子进程都使用父进程创建的共享存储区进行通信，由生产者进程将一个数组中的十个数值发送到由5个缓冲区组成的共享内存中。? 3）两个消费者进程轮流接收并输出这十个数值，同时将两个消费者进程读出的数值进行累加求各和。 4）考虑生产者进程生产的速度和消费者进程速度。(1) a program is designed to create three sub processes from one process, three sub processes is the producer process, and the two is the consumer process. 2) the father child process communicates with the shared storage area created by the parent process, and sends ten values in one array to the shared memory composed of 5 buffers by the producer process. L 3) the two consumer processes take turns to receive and output the ten values, and add values to each of the two consumer processes. 4) take into account the production speed of the producer process and the speed of the consumer process.)

说明：  作业调度——先来先服务，最短作业优先，最高响应比优先(Job scheduling- a first-come first-served, shortest job first, highest priority response ratio)

计科操作系统课程“读者写者”问题的经典解决。(Branch of the operating system programs, " wrote the reader" as a problem to solve classic.)

磁盘文件系统：建立基于磁盘存储设备的UNIX文件系统，在windows系统下模拟UNIX文件管理系统，可用命令行进行基本的文件操作。(Disk file system: the UNIX file system based disk storage devices in the windows system simulation UNIX file management system, basic file operations available command line.)

银行家算法，希望大家喜欢(bankers algorithm, hope you like)

操作系统中模拟作业进入内存的状态，作业调度程序(Operating system job scheduler)

这个程序是模拟采用二级目录结构的磁盘文件系统中的文件操作，它可以实现对文件的一些基本管理，如：读、写、删除文件等。通过这个程序可掌握文件子系统的原理，加深对二级目录结构的文件系统中用户管理、文件管理、目录管理的理解，并用程序实现对文件子系统的模拟。(the procedure is simulated using two disk directory structure of the file system file manipulation, it can be achieved on some basic document management, such as : read, write, delete files. Through this procedure can grasp the principle document subsystems to enhance the structure of the two file system user management, document management, directory management, understanding, and the procedures to achieve the right documents subsystem simulation.)

制冷专业软件，非常实用，可计算制冷系统，制冷剂的物性(Refrigeration professional software is very useful, computable refrigeration system, refrigerant properties)