聊天室客户端程序 Windows控制台应用程序
对应的Linux服务器使用select模型实现:
http://blog.csdn.net/microtong/archive/2009/12/12/4989902.aspx
运行命令行为：Client.exe 127.0.0.1 8000
命令行参数分别为要连接的IP地址和端口
//Client.cpp #include <winsock2.h> #include <stdio.h> #include <windows.h> //引入静态链接库 #pragma comment(lib,"ws2_32.lib") //缓冲区大小 #define BUFFER_SIZE 4096 //用来修改用户姓名的命令 const char* CMD_NAME="name"; //用来退出系统的命令 const char* CMD_BYE="bye"; //负责接收数据的线程 DWORD WINAPI ReceiveThreadProc( LPVOID lpParameter); int main(int argc, char* argv[]){ //判断是否输入了IP地址和端口号 if(argc!=3){ printf("Usage: %s IPAddress PortNumber/n",argv[0]); exit(-1); } //把字符串的IP地址转化为u_long unsigned long ip; if((ip=inet_addr(argv[1]))==INADDR_NONE){ printf("不合法的IP地址：%s",argv[1]); exit(-1); } //把端口号转化成整数 short port; if((port = atoi(argv[2]))==0){ printf("端口号有误！"); exit(-1); } printf("Connecting to %s:%d....../n",inet_ntoa(*(in_addr*)&ip),port); WSADATA wsa; //初始化套接字DLL if(WSAStartup(MAKEWORD(2,2),&wsa)!=0){ printf("套接字初始化失败!"); exit(-1); } //创建套接字 SOCKET sock; if((sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET){ printf("创建套接字失败！"); exit(-1); } struct sockaddr_in serverAddress; memset(&serverAddress,0,sizeof(sockaddr_in)); serverAddress.sin_family=AF_INET; serverAddress.sin_addr.S_un.S_addr = ip; serverAddress.sin_port = htons(port); //建立和服务器的连接 if(connect(sock,(sockaddr*)&serverAddress,sizeof(serverAddress))==SOCKET_ERROR){ printf("建立连接失败！"); exit(-1); } //创建从服务器接收数据的线程 DWORD threadId; CreateThread(NULL,0,ReceiveThreadProc,&sock,0,&threadId); printf(">"); char buf[BUFFER_SIZE]; while(1){ //从控制台读取一行数据 gets(buf); printf(">"); //发送给服务器 if(send(sock,buf,strlen(buf),0)==SOCKET_ERROR){ printf("发送数据失败！"); exit(-1); } } //清理套接字占用的资源 WSACleanup(); return 0; } DWORD WINAPI ReceiveThreadProc( LPVOID lpParameter){ SOCKET s = *(SOCKET*)lpParameter; char receiveBuf[BUFFER_SIZE]; int bytes; while(1){ if((bytes=recv(s,receiveBuf,sizeof(receiveBuf),0))==SOCKET_ERROR){ printf("接收数据失败!/n"); exit(-1); } if(bytes==0){ printf("server is down./n"); exit(-1); } receiveBuf[bytes]='/0'; //如果用户输入了“bye” if(strcmp(receiveBuf,CMD_BYE)==0){ closesocket(s); exit(0); } printf("/n%s/n>",receiveBuf); } }