基于TCP的P2P聊天程序,将Server与Client合为一体，变为一个Chat窗口,选择不同的选项（等待连接、连接）来实现Server或Client，功能更为灵活方便。-TCP-based chat program of P2P, Server and Client will be combined into a Chat window, choose a different option (wait for connections, connections) to achieve the