该程序包含两个程序 一个是主机server 另一个是clinet程序 主机server实现整体控客服机交换信息。clinet实现客户之间的通信。程序实现聊天功能和文件传输等功能。-The program consists of two procedures is the host server to another host server is clinet program to achieve the overall control the exchange of information cu