Lesson20Code

windows xp自动关机测试可用 适合看着电脑才能睡得着的同学！(auto close PC )

模拟布朗无规则运动的程序，运行平台：windows，编程语言：Visual Basic。(Brown simulated irregular movement procedures, operating platform: windows, programming languages: Visual Basic.)

说明：  汤姆斯旺C＋＋编程秘诀，下载后解压缩即可(Thomas Wong C programming tips, download can decompress)

示例程序用了最少的代码实现了对USB的启用禁用操作，对想做windows设备控制的朋友应该有抛砖引玉的作用。(Sample program code used to achieve a minimum of USB-enabled disable operation, pairs of friends want to windows device control should have the role of attracting valuable opinions.)

会发声的按钮，VC++经典编程源码，很好的参考资料。(Will sound button, VC++ classic programming source code, a good reference.)

泡泡运动，通过载入泡泡图片和背景。运用动量守恒定律来实现泡泡的碰撞。可能缺少几个图片，大家自己补充一下就好(Bubble motion pictures and background by loading bubble. The use of the law of conservation of momentum to achieve bubble collisions. May be missing a few pictures, we like to add your own)

matlab中fsk调制与解解调解调方式有相干与非相干解调哟 (matlab fsk modulation and the solution demodulation Demodulation coherent and incoherent demodulation yo)

用两个字符形成点阵大字，VC++经典编程源码，很好的参考资料。(Lattice with two characters form characters, VC++ classical programming source code, a good reference.)

51单片机跑马灯程序，左右跑马灯，用于熟悉51单片机的初级程序。(LED horse race lamp)

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 )