基于IP多播的组讨论会实例,程序运行之后即会自动加入会议组,组中的每个成员都可以接收到你发送的消息,聊天记录窗口下显示组中每个用户发送的消息。-Based on IP Multicast examples of the group discussions, the program will automatically run after the group joined the meeting, each member of the group can receive messages sent