数据结构上机实验——哈弗曼树。可实现根据节点大小建立哈弗曼树并对其进行编码，根据自定义输入编码进行解码。简明、易懂、C++自编版。-Data structure on experiments- Ha Fuman tree. Can be realized according to the size of the establishment of Ha Fuman tree node and encode, according to the custom input encoding to dec