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#include<winsock2.h>//winsock的头文件 #include<iostream> using namespace std; //指定动态库的lib文件 #pragma comment(lib,"ws2_32.lib") //TCP客户端 int main() { //初始化winsock2.2相关的动态库 WSADATA wd;//获取socket相关信息 if (WSAStartup(MAKEWORD(2, 2), &wd) != 0)//0表示成功 { cout << "WSAStartup error:" << WSAGetLastError() << endl; return 0; } //1.创建TCP socket , 流式套接字 SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (s == INVALID_SOCKET) { cout << "socket error:" << WSAGetLastError() << endl; return 0; } //2.链接服务端 sockaddr_in addr;//不建议使用sockaddr,建议用sockaddr_in addr.sin_port = htons(6000);//网络字节序 addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//网络字节序 addr.sin_family = AF_INET; //地址族 int len = sizeof(sockaddr_in); if (connect(s, (sockaddr*)&addr, len) == SOCKET_ERROR) { cout << "connect error:" << WSAGetLastError() << endl; return 0; } //3.接受发送消息 int ret = 0; do { //接受客户端的消息 char buf[64] = { ‘\0‘ }; ret = recv(s, buf, 64, 0);//把flag置0 cout << "recv" << inet_ntoa(addr.sin_addr) << ": " << buf << endl;// inet_ntoa转换为IP字符串 //发送 ret = send(s, "I am Client!", strlen("I am Client!"), 0); Sleep(1000); } while (ret != SOCKET_ERROR && ret != 0); //4.关闭套接字 closesocket(s); //清理winsock环境 WSACleanup(); return 0; }