此程序是基于哈夫曼树的编码和译码操作！可实现根据叶子结点的权值，进行二进制编码！根据所输入的编码，找出叶子结点！-This procedure is based on Huffman coding and decoding tree operation! Can be realized under the leaf nodes of the right value to binary code! According to the input coding to identify the leaf