这是一个普通的聊天程序。服务器用C写，客户端的逻辑层用C写，客户端用户界面用Java写，它和逻辑层之间用JNI相连。此程序运行在Linux+Netbean之上。-This is an ordinary chat program. Server written in C, client written in C, the logic layer, client-side user interface written in Java, it is connected to the logical l