准备一个文件，统计该文件中各种字符的频率，对各字符进行Huffman编码，将该文件翻译成Huffman编码文件，再将Huffman编码文件翻译成源文件。-prepared a document, statistics that document the frequency of various characters, on the characters Huffman coding, the document translated into Huffman coding documents, H