shannon编码.cpp Shannon编码采用了先对概率分布排序后，再进行取码长，码长的选取方式是对概率累和取以2为底的对数形式。这种编码具有一定的局限性，当概率很接近时，码长会去到相等的长度。-shannon coding. cpp Shannon coding uses the first order of probability distribution, after taking further code length, code length selection method is