关于哈夫曼树的一个例子，包扩哈夫曼树和哈夫曼编码的存储表示，哈夫曼树的构造，以及哈夫曼树的编码-An example of the Huffman tree, including expansion of the storage representation of the Huffman tree and Huffman encoding Huffman tree structure, as well as the encoding of the Huffman tree