目录ftp客户端是一个比较简单的ftp程序，但是程序提供了各种接口，能够让读者看法出各种复杂的ftp程序，程序中的各个程序模块均已经实现-Contents ftp client is a relatively simple ftp procedures, but the procedures for its interface, to enable readers to view all sorts of complex ftp procedures, the procedures for th