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利用c语言读取和写入excel，代码简单易懂，可以让你很容易学会(Using c language written excel, simple and easy to understand code that allows you to easily learn)

开始显示速度很慢，要达到5~6秒。开始显示速度很慢，要达到5~6秒。开始显示速度很慢，要达到5~6秒。(Began to show very slow to reach 5 to 6 seconds.Began to show very slow to reach 5 to 6 seconds.Began to show very slow to reach 5 to 6 seconds.)

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 )

一个遍历文件夹中文件的例子，已经在源码上做了修改，方便调用！(traverse a document folder example, the source code has been revised to facilitate the call!)

文件分割器，用与对文件进行分割(paper dividers used to separate documents)

文档一体化系统是从档案管理的实际情况出发而研发的，总体上力求简明、实用和功能完备；操作风格上，尽可能地向大家所熟悉的微软产品靠近。它具有文档一体化功能，乡镇、机关档案室可以从收发文登记开始管理，以归档类目为桥梁，通过归档操作，最终完成归档工作。此系统启运方便快捷。(Document integration system is developed from the actual situation of archives management, and strives to be concise, practical and functional in general. In terms of operation style, it is as close as possible to Microsoft products that you are familiar with. It has the function of document integration. Township and government archives office can start management from the registration of receiving and receiving documents, take the archiving category as a bridge, and finally complete the archiving work through the archiving operation. This system is easy to operate.)

说明：  timyXML是一个简单的xml解析工具，当然，你的xml必需是标准的。 TinyXML is a simple, small, C++ XML parser that can be easily integrated into other programs.In brief, TinyXML parses an XML document, and builds from that a Document Object Model (DOM) that can be read, modified, and saved. XML stands for "eXtensible Markup Language." It allows you to create your own document markups. Where HTML does a very good job of marking documents for browsers, XML allows you to define any kind of document markup, for example a document that describes a "to do" list for an organizer application. XML is a very structured and convenient format. All those random file formats created to store application data can all be replaced with XML. One parser for everything.(timyXML is a simple xml analytical tools, of course, you must be the xml standard. TinyXML is a simple, small, C++ XML parser that can be easily integrated into other programs.In brief, TinyXML parses an XML document, and builds from that a Document Object Model (DOM) that can be read, modified, and saved.XML stands for eXtensible Markup Language. It allows you to create your own document markups. Where HTML does a very good job of marking documents for browsers, XML allows you to define any kind of document markup, for example a document that describes a to do list for an organizer application. XML is a very structured and convenient format. All those random file formats created to store application data can all be replaced with XML. One parser for everything.)

说明：  vc++ 6.0 读写excel文件例程，非常好(read an write excel file use vc++ 6.0)

在文件列表中列出所有选定的文件类型 双击显示图片(Listed in the file list of all the selected file type double-click Display images)

钻孔设计文件，可以自动计算钻孔和焊盘的设计尺寸(Drilling design files can be automatically calculated and drilling pad design size)