#include <iostream>

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#include <iostream>#include <WinSock2.h>#pragma comment(lib,"wsock32.lib") //引入庫檔案using namespace std;WSADATA wsaData;int retVal;//返回碼int main(){    WSAStartup(MAKEWORD(2, 2), &wsaData);    SOCKET sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);//建立一個通訊端    SOCKADDR_IN servAddr;    servAddr.sin_family = AF_INET;//TCP UDP協議;    servAddr.sin_port = htons((short)4999);//伺服器連接埠    servAddr.sin_addr.s_addr = inet_addr("127.0.0.1");//設定伺服器位址    retVal = connect(sHost, (LPSOCKADDR)&servAddr, sizeof(servAddr));//串連伺服器    char buf[128];//資料緩衝區    int BUF_SIZE = 128;//接收位元組數    ZeroMemory(buf, BUF_SIZE);    strcpy_s(buf, "MyTcp");    retVal = send(sHost, buf, strlen(buf), 0);    closesocket(sHost);    WSACleanup();    return 0;}

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#include <iostream>