Introduction - If you have any usage issues, please Google them yourself
(1) to receive the raw data: Reading from the terminal into the character set size of n, n and n characters of the right value, the establishment of Huffman tree, stored in a document in hfmtree.dat. (2) Coding: Using the Huffman tree has been completed (such as not to memory, read from the document hfmtree.dat income) on the body of the document is encoded, and then the results into a document in codefile.dat. (3) Decoding: The Huffman tree has been built in the document codefile.dat code decoding, resulting in a document deposited in textfile.dat. (4) Print coding rules: that is, the characters one-to-one relationship with the coding. (5) Print Huffman tree: will have been in memory of the Huffman tree intuitive way to show that in terminal.