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#include <iostream>

#include <iostream>
#include <WinSock2.h>
#pragma comment(lib,"wsock32.lib") //引入库文件
using namespace std;
WSADATA wsaData;
int retVal;//返回码
int main()
{
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    SOCKET sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);//创建一个套接字
    SOCKADDR_IN servAddr;
    servAddr.sin_family = AF_INET;//TCP UDP协议;
    servAddr.sin_port = htons((short)4999);//服务器端口
    servAddr.sin_addr.s_addr = inet_addr("127.0.0.1");//设置服务器地址
    retVal = connect(sHost, (LPSOCKADDR)&servAddr, sizeof(servAddr));//连接服务器
    char buf[128];//数据缓冲区
    int BUF_SIZE = 128;//接收字节数
    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>