c++实现霍夫曼编码，用户先输入一段文字，然后程序执行统计并进行编码，最好输出编码并统计编码平均长度。有类和无类两种形式源代码-c++ achieve the Huffman code, the user to enter a section of text, and then the implementation of statistical procedures and codes, the best output encoding and statistical encoding the