哈夫曼编/译码器

利用哈夫曼编码进行信道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。

要求：一个完整的系统应具有以下功能：

(1)初始化(Initialization)。从终端读入字符集大小n，以及n个字符和权值,

建立哈夫曼树，并将它存于文件hfmTree中。

(2)编码(Encoding)。利用已建好的哈夫曼树(如不在内存，则从文件hfmTree中读

入)对文件ToBeTrans中的正文进行编码，然后将结果存入文件CodeFile中。

(3)译码(Decoding)。利用已建好的哈夫曼树将文件CodeFile中的代码进行译码，结果存入文件TextFile中。- Huffman encoder/decoder

The use of Huffman coding channel communication can greatly improve the channel utilization, time-to-information transmission, and reduce transmission costs. However, this requires the sending end through a coding system pre-treatment data encoding, decoding at the receiving end of the data (recovery). For duplex channel (ie two-way transmission channel), each side needs a complete encoder/decoder system. Write a Huffman encoder/decoder system test for such information transceiver station.

Requirements: a complete system should have the following features:

(1) initialization (Initialization). Read from the terminal character set size n, and n characters and weights,

      Create a Huffman tree, and save it in a file hfmTree.

(2) encoding (encoding). Huffman tree has been built (if not in memory, read from the file hfmTree

      Into) the file ToBeTrans the text encoding, and the result is stored in the file CodeFile.

(3) decoding