统计文章中26个字母出现的频率并以此为权值构建哈弗曼树，输出各个字母的哈弗曼编码-Statistics article 26 the frequency of letters and as a weight build Hafu Man tree, the output encoding of each letter Hafu Man

实现的是26个英文字母的huffman编码 并且计算了编码效率-To achieve the 26 English letters huffman encoding and coding efficiency is calculated