FTP服务器端及客户端的设计及实现，使用CSocket编程，图形界面，实现了文件上传，下载，删除、文件夹的上传下载删除、断点续传等功能-FTP server-side and client-side design and implementation, use CSocket programming, graphical interface, realize the file upload, download, delete, folders, upload download delete, H