利用哈夫曼编码进行通信可以大大提高信道利用率，缩短信息传输时间，降低传输成本。这要求在发送端通过一个编码系统对待传数据预先编码，在接收端将传来的数据进行译码（解码）。对于双工信道（即可以双向传输信息的信道），每端都需要一个完整的编/译码系统。试为这样的信息收发站设计一个哈夫曼编/译码系统。-The use of Huffman encoding can greatly improve the communication channel utilization, reduce the information transmission time, and lower transmission costs. This requires the sender to transmit data through a coding system pre coding, decoding the data received at the receiving end (decoding). For a duplex channel (i.e., a channel that can transmit information in both directions), a complete encoding/decoding system is required for each end. Try to design a Huffman encoding/decoding system for this information hubs.