准备一个文本文件，统计该文件中各文字的出现频率，并对各文字构造哈夫曼编码，再将该文件翻译成哈夫曼编码文件,最后将哈夫曼编码文件翻译成原文件。-Prepare a text file, statistics of the file in the words of the frequency, and the text structure Huffman coding, then the documents translated into Huffman coding file and will