工作原理： 脉冲输入，记录30个脉冲的间隔时间（总时间），LED显示出来，牵涉到数码管的轮流点亮，以及LED的码。输入端口一定要用个 74LS14整一下，图上没有。数码管使用共阴数码管。MAXPLUS编译。 测试时将光电门的信号端一块连接到J2口的第三管脚，同时第一管脚为地，应该与光电门的地连接（共地）。 开始测试： 按下按键，应该可以见到LED被点亮，指示可以开始转动转动惯量盘，等遮光片遮挡30次光电门后， LED熄灭，数码管有数字显示，此为时间值，单位为秒，与智能计时器的连续脉冲测试模式中的T30值进行比较。 再按下按键即可进行下一次测量。 水平有限，见笑。-principle : pulse input, recording 30 pulse interval (total time), the LED display and digital control involves rotating lights, and LED yards. Input port must use the entire 000 74LS14 that there is no map. Digital control the use of digital control were overcast. Segments compiler. Test the door to the photoelectric signal an end connected to the mouth of the third J2 pins, for the first pin, should the photoelectric doors to connect (to a total). Testing : press the button, should be able to see the LEDs are lit, instructions to start the rotation inertia set, films such as shading block 30 photoelectric doors, the LED is off, digital possession figures show that for the time value of this unit for seconds Intelligent timer with a continuous pulse mode testing of T30 values were compare 下载
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捕获网络中的IP数据包，解析数据包的内容，将结果显示在标准输出上，并同时写入日志文件。 程序的具体要求如下： 1）以命令行形式运行：ipparse logfile，其中ipparse是程序名, 而logfile则代表记录结果的日志文件。 2）在标准输出和日志文件中写入捕获的IP包的版本、头长度、服务类型、数据包总长度、数据包标识、分段标志、分段偏移值、生存时间、上层协议类型、头校验和、源IP地址和目的IP地址等内容。 3）当程序接收到键盘输入Ctrl+C时退出。 -capture of IP network data packets, packet analysis, the results show that the standard output. and at the same time into the log file. Procedures for the specific requirements are as follows : a) to run on the command line : ipparse logfile. which is ipparse programs, and logfile on behalf of record results log file. 2) In the standard output and log files were written into the IP packet capture versions, the first length, type of service, packet length, packets logo, subparagraph signs subparagraph offset values, the survival time, upper layer protocol type, and the first check, source IP address and destination address. 3) When the procedures to receive keyboard input Ctrl C aborted. 下载
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