本程序采用哈弗曼编码技术对用户输入的文本进行压塑，当用户按回车键之后，便会显示压塑之后的文本，并且会显示每个字符的二进制代码。-This code is used to be compress the text you enter,adopting the method of haffmancode .When you enter the resource text ,you will see the compressing mold and the binary code of every character.