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该系统应具有以下功能： （1） I：初始化（Initialization）。从终端读入字符集大小n，以及n个字符和n个权值，建立哈夫曼树，并将它存于文件hfmTree中。 （2） E：编码（Encoding）。利用已建好的哈夫曼树（如不在内存，则从文件hfmTree中读入），对文件ToBeTran中的正文进行编码，然后将结果存入文件CodeFile中。 （3） D：译码（Decoding）。利用已建好的哈夫曼树将文件CodeFile中的代码进行译码，结果存入文件TextFile中。 （4） P：打印代码文件（Print）。将文件CodeFile以紧凑格式显示在终端上，每行50个代码。同时将此字符形式的编码文件写入文件CodePrin中。 （5） T：打印哈夫曼树（Tree printing）。将已在 中的哈夫曼树以直观的方式（树或凹入表形式）显示在终端上，同时将此字符形式的哈夫曼树写入文件TreePrint中。 (The system should have the following features: (1) I: initialization (Initialization). Read from the terminal character set size n, and n and n characters right value, establishes a Huffman tree, and save it in the file hfmTree in. (2) E: encoding (Encoding). Has been built using the Huffman tree (if not in memory, reads from the file hfmTree), the text of the document ToBeTran encoded, and then putting the result in the CodeFile file. (3) D: decoding (Decoding). Huffman tree has been built using the file CodeFile the code will be decoded, the result is stored in the file TextFile. (4) P: Printing code files (Print). CodeFile in a compact format the document displayed on the terminal, one per line 50 code. While this character in the form of written documents CodePrin encoded file in. (5) T: Print Huffman tree (Tree printing). Would have been in the Huffman tree in an intuitive way (tree or recessed table form) displayed on the terminal, but this form of characters written to the file )

打印机监控系统，可以监控打印机打印的内容等。(The printer monitoring system that can monitor the printer to print the contents of.)

利用QT控制打印机打印图片。（将图片放入QT的窗口中，打印窗口）(Use QT to control printer to print pictures. (put the picture in the window of the QT, print the window))

说明：  打印机命令语言(PCL)程序的简单实例，可做简单的参考。(PCL language, a simple example to do a simple reference.)

说明：  这是一个如何调用条码打印机的DLL文件来打印条形码的例子,主要是教你怎么写DLL声名语句(how it is called a bar code printers DLL files to print bar code examples, mainly to teach you how to write DLL famous phrase)

打印虚拟驱动，提取自wdk 8.1，需要wdk环境。(Print a virtual drive, extracted WDK 8.1, need WDK environment.)

针式打印机开发,继承了好多有点 丙炔能打印各种纸张(zhen shi da yi cheng xu kaifa licheng ru guo youmao bing kanchulai qingjiao)

设置多重群组的打印报表，C++Builder精选编程学习源码，很好的参考资料。(Print statements to set multiple group, C++Builder select learning programming source code, a good reference.)

与打印机的通信工具，文件传输工具,也可做渗透打印机。( PJL File Transfer command line interface to PJLlib functionality )

一个比较简单的c++实例，一个比较简单的c++实例(sample demo)