哈夫曼树相关程序，利用哈夫曼（最优树）的原理，实现编码译码的实例之一。本程序包括，按给定字母频率生成编码表，编码、译码过程。-Huffman tree associated procedures, the use of Huffman (optimal tree) in principle, to achieve one instance of coding and decoding. The program includes, at a given frequency to generate