1、用Proteus设计原理图，要求显示出里程，速度，总价
2、用信号发生器来产生出租车的模拟信号
3、提交原理图文件，Keil工程文件和汇编源程序文件。
4、出租车轮胎周长按1.83米计算。2公里以内按8元计算，超过2公里每公里按2.6元计算。不考虑其他费用。
2019-12-21 21:04:27
22KB
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Requirements
1． Simulate a Unix file system on your Windows Platform
2． Understand the file system on Unix system, and the usage of i-nodes
3． Implement the function of sub-directory
4． The task needs to be completed using C++ or C
5．
Tasks/Functionalities
The following functions are required in your file system:
1． Allocate 16MB space in memory as the storage for your file system. The space is divided as
blocks with block size 1KB
Assume block address length is 32-bit;
Design the information contained in i-node
The i-node should support up to 10 direct block addresses
The i-node should support at least one indirect block address
2． The fist block is used for storing the i-node for the root directory(/). While your program is
lunched, two directories (/dir1 and / dir1/dir2) should be created, and also two files need to be
written as /dir1/file1 and /dir1/dir2/file2 (5 marks)
3． File 1 and 2 contain the message of “This is file 1.” and “This is file2”.
4． Following commands should be supported in your system：
a) Create a file：createFile fileName fileSize (10 marks)
i.e.：createFile /dir1/myFile 1024 (in bytes)
if fileSiz > max file size, print out an error message.
The file content is filled up with filename + repeated digits from 0 - 9
i.e.: “myFile012345678901234567890123….”
b) Delete a file：deleteFile filename (10 marks)
i.e.：deleteFile /dir1/myFile
c) Create a directory：createDir (5 marks)
i.e.：createDir /dir1/sub1
d) Delete a directory：deleteDir (5 marks)
i.e.: deleteDir /dir1/sub1 （The current working directory is not allowed to be
deleted）
e) Change current working direcotry：changeDir (5 marks)
i.e.: changeDir /dir2
f) List all the files and sub-directories under current working directory：dir (5 marks)
You also need to list at least two file attributes. (i.e. file size, time created, etc.)
g) Copy a file : cp (5 marks)
i.e.: file1 file2
h) Display the usage of storage space：sum (10 marks)
Display the usage of the 16MB
2019-12-21 20:28:55
1.27MB
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1．在linux中实现一个命令执行程序doit，它执行命令行参数中的命令，之后统计
1）命令执行占用的CPU时间(包括用户态和系统态时间，以毫秒为单位)，
2）命令执行的时间，
3）进程被抢占的次数，
4）进程主动放弃CPU的次数，
5）进程执行过程中发生缺页的次数
2019-12-21 19:59:40
3KB
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数据库课程设计的全套文档及代码，需要自己搭建MySql数据库，其中包括安装包，配置和使用说明，源代码；给需要参考的同学使用，仅供参考！
2019-12-21 19:51:28
9.65MB
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