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，但是，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（复原）。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写一哈夫曼编/译码系统。-Communicate using Huffman coding can greatly improve the channel utilization, reduce transmission time information, reducing transmission costs, but this requires the sender transmission through a coding system for treatment of pre-coded data, at the receiving end will be translated data from the code (recovery). For the duplex channel (ie, two-way transmission of information to the channel), each side needs a complete encoding/decoding system. Test for such messaging station to write a Huffman encoding/decoding system.