這是C++ SOCKET網路程式中的C/S結構之TCP "Hello World !"，共兩個控制檯工程：

////////////////////////////////////////////////////////////////////////// // TCPServer.cpp #include <stdio.h> #include <WINSOCK2.H> #pragma comment(lib,"WS2_32.lib") #define BUF_SIZE 64 // 緩衝區大小 int main(void) { WSADATA wsd; // WSADATA變數 SOCKET sServer; // 伺服器套接字 SOCKET sClient; // 客戶端套接字 int retVal; // 返回值 char buf[BUF_SIZE]; // 接受資料 // 初始化套接字動態庫 ZeroMemory(buf,BUF_SIZE); if(WSAStartup(MAKEWORD(2,2),&wsd) != 0) { printf("WSAStartup failed !/n"); return 1; } // 建立套接字 sServer = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(INVALID_SOCKET == sServer) { printf("socket failed !/n"); WSACleanup(); return -1; } // 伺服器套接字地址 SOCKADDR_IN addrServ; addrServ.sin_family = AF_INET; addrServ.sin_port = htons(4999); addrServ.sin_addr.S_un.S_addr = htonl(INADDR_ANY); // 繫結套接字 retVal = bind(sServer,(const struct sockaddr*)&addrServ,sizeof(SOCKADDR_IN)); if(SOCKET_ERROR == retVal) { printf("bind failed !/n"); closesocket(sServer); WSACleanup(); return -1; } // 監聽套接字 retVal = listen(sServer,1); if(SOCKET_ERROR == retVal) { printf("listen failed !/n"); closesocket(sServer); WSACleanup(); return -1; } // 接受客戶請求 sockaddr_in addrClient; int addrClientlen = sizeof(addrClient); sClient = accept(sServer,(sockaddr FAR*)&addrClient,&addrClientlen); if(INVALID_SOCKET == sClient) { printf("accept failed !/n"); closesocket(sServer); WSACleanup(); return -1; } // 接受客戶資料 retVal = recv(sClient,buf,BUFSIZ,0); if(SOCKET_ERROR == retVal) { printf("recv failed !/n"); closesocket(sServer); closesocket(sClient); WSACleanup(); return -1; } // 退出程式 printf("Recv From Client:%s/n",buf); retVal = send(sClient,"Hello World !",strlen("Hello World !"),0); if(SOCKET_ERROR == retVal) { printf("send failed !/n"); closesocket(sServer); closesocket(sClient); WSACleanup(); return -1; } // 退出程式 closesocket(sServer); closesocket(sClient); WSACleanup(); return 0; }

////////////////////////////////////////////////////////////////////////// // TCPClient.cpp #include <stdio.h> #include <Winsock2.H> #pragma comment(lib,"WS2_32.lib") #define BUF_SIZE 64 // 緩衝區大小 int main(void) { WSADATA wsd; // 初始化資料庫 SOCKET sHost; // 伺服器套接字 SOCKADDR_IN servAddr; // 伺服器地址 char buf[BUF_SIZE]; // 接受資料緩衝區 int retVal; // 返回值 if(WSAStartup(MAKEWORD(2,2),&wsd) != 0) { printf("WSAStartup failed !/n"); return 1; } // 建立套接字 sHost = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(INVALID_SOCKET == sHost) { printf("socket failed !/n"); WSACleanup(); return -1; } // 設定伺服器地址 servAddr.sin_family = AF_INET; servAddr.sin_addr.S_un.S_addr = inet_addr("192.168.1.254"); servAddr.sin_port = htons(4999); int sServerAddlen = sizeof(servAddr); // 連線伺服器 retVal = connect(sHost,(LPSOCKADDR)&servAddr,sizeof(servAddr)); if(SOCKET_ERROR == retVal) { printf("connect failed !/n"); closesocket(sHost); WSACleanup(); } // 向伺服器傳送資料 ZeroMemory(buf,BUF_SIZE); strcpy(buf,"Hello World !"); retVal = send(sHost,buf,strlen(buf),0); if(SOCKET_ERROR == retVal) { printf("send failed !/n"); closesocket(sHost); WSACleanup(); return -1; } // 向伺服器接受資料 retVal = recv(sHost,buf,sizeof(buf)+1,0); printf("Recv From Server: %s/n",buf); // 退出程式 closesocket(sHost); WSACleanup(); return 0; }

程式執行效果：

原始碼下載地址：