程序能实现基本的FTP客户端功能，能登陆FTP服务器，显示登陆客户机目录下的文件和目录名，能从该目录中选择下载服务器的文件，也能向服务器上传文件。-FTP programs can achieve the basic function of the client can login FTP server, the client displays log files and directories under the directory name from the directory of your choice to download the file server can also upload files to the server.