（1）新建、打开和保存地图文档

GPS C语言编程，功能齐全，请下载查看。成长在于分享！！！(GPS C program this is very good.Now download it !)

大学老师布置的作业，第一个关于流水灯，第二个和第三个关于单向流水灯，最后是四闪。(Homework assigned by university teacher)

可以实现大地坐标系与三维空间直角坐标系之间的转换。高斯正反算等(The transformation between geodetic coordinate system and three-dimensional space rectangular coordinate system can be realized. Gauss forward and backward calculation, etc.)

Effective C++ 非常经典的C++书籍，基本上学C++的人没有不知道这本书的。书中介绍了55个准则，每一条准则描述一个编写出更好的C++的方式。(Effective C++ is the classic C++ books, basically learning C++, people do not know this book. The book describes 55 guidelines, each guideline describes a write better C++ way.)

说明：  Official OPC UA .Net Standard Stack and Samples from the OPC Foundation

农场管理系统的C++实现 系统具有版本控制及基本的数据库管理功能 问题描述：农场主手下有经理、工人等人类。还有各种动物。这个系统能对不同操作对象（农场主、经理、工人等）提供不同操作权限。能够基本模拟农场的运行模式(Farm management system c++ implementation of the system with functions of version control and basic management problem description: farmers had managers, workers and other human beings. There are all kinds of animals. Can the system for different operating object (farmers, managers, workers, etc.) to provide different operating authority. The mode of the basic simulation to farm)

Forshare8.28完整源代码，完整开源版本。不错的！(Forshare 8.28 complete source code, complete open source version. Excellent!)

It is a telephone directory written in c++ with beautiful graphics.

说明：  可以联网显示天气，包括明天后天的天气，还有时间显示，地区显示。(Real-time display of water temperature, flow, but also according to the proportion of water charges. With locking function)

说明：  差分整合移动平均自回归模型，又称整合移动平均自回归模型（移动也可称作滑动），是时间序列预测分析方法之一。(Differential integrated moving average autoregressive model, also known as integrated moving average autoregressive model (moving also known as sliding), is one of the time series prediction and analysis methods.)