net

分布式电源（燃料电池）的PSCAD模型，包含直流侧和逆变侧的详细模型，调试完成(Distributed Power (fuel cell) PSCAD model that contains detailed model DC side and the inverter side, commissioning)

基于C8051F020单片机的液晶驱动程序，通过编译、链接，调试没有错误，压缩包里有C程序号头文件以及源程序的汇编版本。(C8051F020-based single-chip LCD driver, through the compile, link, debug, no errors, compression bag has C header files, as well as procedures for its source code version of the compilation.)

说明：  C8051F410单片机通过spi控制RF芯片(C8051F410 MCU controls RF chip through SPI)

pci的接口原理图,帮助初学者快速完成pci接口配置(pci interface schematics to help beginners quickly pci interface configuration)

ME850单片机开发实验仪演示程序 - LCD1602显示 基于 c51系列的单片机程序，用AT89S52延时通过(ME850 SCM experimental instrument demo- LCD1602 display based on c51 series SCM process, using AT89S52 delay through)

使用stm32开发板的ADC进行1000Hz采样后，通过ESP8266wifi模块将数据传输至PC端。(After 1000Hz sampling with ADC of STM32 development board, data is transmitted to PC through ESP8266 WiFi module.)

湖北水文信息系统水位雨量采集器的C51源代码，已经调试通过(Hubei hydrological information system for collecting rain water level of C51 source code, debugging has been adopted)

LPC analysis filter.Allowing wrap around so that two wraps can cancel each other. The rare cases where the result wraps around can only be triggered by invalid streams.

基于ARM处理器的EtherCAT 通信开发平台(EtherCAT Communication Development Platform Based on ARM Processor)

说明：  下面的程序利用友元函数求两点间的距离。请你将有关的程序补充完整，并总结为什么这里要用友元函数来求两点间的距离。(using friend to get the result.)