HuffmanCoding，哈夫曼树压缩编码，实现了压缩及解压缩-HuffmanCoding, Huffman tree coding, compression and decompression

利用霍夫曼树对txt文件进行压缩与解压缩，用二进制确定权值-Txt file using the Huffman tree for compression and decompression, with the right to determine the binary value