通过输入文本文件(待压缩文件)的文件名(.txt)向指定目标文件夹输出压缩文件(文本文件)，同时计算出文件压缩率。附加解压功能。-By entering text file (to be compressed file) of the file name (. Txt) to the designated destination folder output compressed file (text file), at the same time to calculate the rate of