局域网编程，能拷贝一个指定的文件到局域网内各台电脑所共享并支持可写的文件夹内，没有客户端，自己写的，很合适学习-Local area network programming, be able to copy a specified file to the computer within the LAN and support for writable shared folders, no client, wrote it myself, it is appropriate to study