Arith-N 是可以在命令行指定阶数的 N 阶上下文自适应算术编码通用压缩、解压缩程序，由于是用作教程示例，为清晰起见，在某些地方并没有刻意进行效率上的优化。由王笨笨大侠提供,Arith-N is specified in the command-line order of the N-order context adaptive arithmetic coding common compression, decompression procedures, because it is used as a tutorial example, for the sake of clarity in some places have no intention to carry out the optimization of efficiency. Provided by Wang Ben Ben heroes