用c++实现的基于Linux的ftp客户端，实现了ftp协议的大多数功能，上传文件，下载文件，创建目录，删除目录，删除文件，获取文件大小，获取文件和目录列表等。-Using c++ to achieve ftp client based on Linux, realizes the most functions of FTP protocol, upload files, download files, create a directory, deleting directory, delete files, get the file size, access to files and directories list etc..