udp-cast!可以用multicasting的方式把檔案傳送到一個群組，很好用~~~~!有興趣的人式式吧。 1.先make 2.會產生兩個兩進位檔，sender用來擴播檔案 詳細就man udp-cast吧-udp-cast! way multicasting can be used to send the file to a group, very good with those who are interested in ~~~~!-style-type bar. 1. Fi