编制一个类似QQ的即时聊天程序，该程序使用面向连接的Socket通信机制。整个程序分成服务器端和客户端两部分，通信双方能够互相发送文字进行简单的聊天，最后双方都可以输入quit结束对话-The preparation of a similar QQ chat program, the program uses the Socket communication mechanism of connection oriented. The whole process is divided into t