CDM-GTN-umat

读写注册表，添加或修改环境变量,完整代码实现，(set enviorenment)

说明：  升级文件列表制作工具，应用程序编程源码，很好的参考资料。(Upgrade file list creation tools, application programming source code, a good reference.)

一整天五分钟某个交通断面的交通流量数据，excel格式数据。(Five minutes a day for a traffic section of traffic data, excel format.)

实现在程序运行完毕后,删除自身exe文件.适用于需要时间限制类程序.(Time limit for applications that require such procedures in the program is complete, delete the exe file.)

首先通过文件操作，读取文件内容，把字符逐个提取后统计字符频率，建立哈夫曼树和进行哈夫曼编码，当然这是根据ASCII编码来将字符转换为二进制，然后实现前缀编码，然后把编码后的使用二进制流写入相应文件(First through file operations, read the file content, the characters one by one after extracting character frequency statistics, establish a Huffman tree and Huffman encoding, and, of course, this is according to ASCII code to convert characters to the binary, then realize the prefix encoding, and then the encoded using binary stream into the corresponding files )

把名为GDP的文件中的各项内容提取出来，即读字符，然后在屏幕上整齐排列输出(The GDP of the file name of the content is extracted, that is, reading characters, and then neatly arranged on the screen output)

绘制描述事件先后顺序的前驱图，可以拖动现有结点的位置，与该结点相连的有向边也随之移动；可以将前驱图存入文件，从文件中取出(Drawing description of the event sequence of the precursor Figure)

文件修改的监视(The example of monitoring the change of files)

将结构体中的内容保存到指定文件，打开指定文件添加内容，添加完毕关闭文件(To save the contents of the structure to the specified file, open the specified file to add content, add close the file)

文件对比用软件，用于单个文件之间对比，代码对比，多个文件对比等(beyond compare is a useful software, which can be helpful for you to compare two file and find the difference between them)