坐标转换，适应与地理信息系统的各种坐标系统换算

常用电子原件参数大全包括：125贴片三极管上的印字，与真实名称的对照表，2SJ场管大全，9000系列三极管资料，常用晶体与场管，电阻阻值表，贴片代码查找工具，贴片电容耐压，贴片电阻封装跟功率关系。-Original parameters of commonly used e-Daquan include: 125 SMD transistors on the printing, and the real name of the comparison table, 2SJ field pipe Daquan, 9000 series transistor data, commonly used crystal and field control, resistor table, patch code search tool, paste film capacitor voltage, chip resistor package, with power relations.

大部份单片机中，没有USB 主机，要读写U盘，不妨用SL811，扩展，代码OK-Most single-chip, there is no USB host, it is necessary to read and write U disk, may wish to use SL811, expansion, code OK

VB网络连接的程序-VB network connectivity procedures

CS5460的模拟版本驱动，模拟SPI端口对CS5460的操作，包括初始化，读操作，写操作，方便初学者使用。

如果在 ATL 组件程序中调用了 CRT 的运行时刻库函数，比如开平方 sqrt() ，那么编译的时候可能会报错“error LNK2001: unresolved external symbol _main”。怎么办？下面方法中的任何一个都可以纠正这个错误：-If the ATL component called the CRT-program run-time library functions, such as the square root sqrt (), then the compiler will complain when possible " error LNK2001: unresolved external symbol _main" . How to do? Any one of the following methods can rectify this error:

信号转换可以讲非方波信号转换为方波 很好用的啊可以测频率-swif

小迷宫 用c语言实现 实现的原理很简单 大家自己看吧-small maze with C Language Implementation of the principle is very simple we all Look here

鳄鱼论坛，自己在网上找的，测试了，数据库是mysql的，方便用户使用，有需要的下载吧-Crocodile Forum, the Internet looking for their own testing, and database is mysql, user-friendly to use, there is a need to download bar. .

本来想实现一个规则图形内的颜色渐变填充...但由于一些原因,只完成了颜色填充,不过修改其变量可以改变填充颜色.-Originally wanted to realize the rules of graphics within a gradient fill color ... but for some reason, only the color-filled, but to modify its variables can change the fill color.

本程序是在一个房间里猫捉老鼠的游戏。通过键盘上的上、下、左、右方向键控制一只猫，十只老鼠在窗口中自由活动，可随时改变行走方向，遇窗口边界则改变方向。猫碰到老鼠后就吃掉它（该鼠不再显示）。若猫吃掉所有老鼠，游戏结束并显示游戏所剩时间；若时间用完，猫没有吃掉所有老鼠， 游戏结束并显示所剩老鼠数目。-This program is in a room where a cat-and-mouse game. Through the keyboard up, down, left and right arrow keys to control a cat, 10 mice in the window to freely travel at any time to change the direction of the window border, however, to change the direction of the event. Encountered after the cat mouse eat it (the mouse is no longer displayed). If the cats eat all the rats, the game is over and displays the time remaining for the game if time runs out, the cat did not eat all the rats, the game is over and displays the number of the remaining mice.