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关于C++的程序书写规范 一个好的软件应该是这样的：它有着经过周密计划和审慎设计的完美的内部结构，同时又具有让人赏心悦目的精美的外观。这样的软件，你可以称它是一件美妙的工艺品，也可以称它是一部复杂而可靠的机器。 编写好的软件肯定离不了好的书写习惯，它有三方面的含义： (1).安全: 你的代码完成所需的功能之余,不要产生负作用(要稳定可靠!) (2).易读: 类、实例、成员变量、成员函数的命名最好让同事一目了然 (3).美观: 让同事看你的程序风格跟看自己的一样；统一就是美 本文内容都是基于这三条的。

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缓冲区溢出笔记之stack溢出。i、预备知识。ii、溢出原理演示。iii、三种常用溢出方法演示及实例分析-Notes buffer overflow on the stack overflow. i, the preparatory knowledge. ii, overflow principle demonstration. iii, three commonly used methods of presentation and examples of overflow analysis

This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. -This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compar

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