利用哈夫曼编码进行信息通讯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个哈夫曼码的编译码系统。-Huffman coding using information and communication can greatly improve the channel utilization, reduce transmission time information, reducing transmission costs. However, this requires the sender pass through a coding system to treat pre-encoded data　came at the receiving end to decode the data (recovery). For a duplex channel (two-way transmission of information that can channel), each side needs a full encoder/decoder system. Test for such messaging station to write a Huffman code encoding and decoding system.