赶学没多久不知道做的好不 大侠请给点意见 怎么改-do not know how long the grand old heroes so please point to talk about how reform

自动更新软件，功能是有判断文件是否存在，添加文件，对文件的读写，入旧版本对吧，然后下载-Automatic update software, there is a judgment whether a file exists, add files, read and write to the file, right into the old version, and then download