设一段电文中有不同出现频率的字符，为了提高电文的输入和翻译效率，必须有一套简短而又不会产生歧义的字符代码。试根据哈夫曼算法，对电文中的不同字符，构造出一棵哈夫曼树，对每个字符进行编码。-Set a message in the frequency of different characters, in order to enhance the message of the input and translation efficiency, we must have a brief characters without ambiguity code. Trial under the Huffman algorithm, the message of the different characters, a Huffman tree is constructed for each character is encoded.