TCPIP网络编程（尹圣雨）简易版回声客户端

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端口号随便写了一个，写的是 2345。

如果需要按下Q键退出，客户端部分加个判断即可

服务端：

#include <iostream>
#include <WinSock2.h>#pragma comment(lib, "ws2_32.lib")using std::cout;
using std::endl;int main()
{WSADATA wsa;if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0){cout << "WSA Error" << endl;return 0;}sockaddr_in sd;sd.sin_family = AF_INET;sd.sin_port = htons(2345);sd.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");// socketSOCKET fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);if (fd == INVALID_SOCKET){cout << "socket error" << endl;return 0;}// bindif (bind(fd, (sockaddr *)(&sd), sizeof(sd)) == SOCKET_ERROR){cout << "bind error" << endl;return 0;}// listenlisten(fd, 10);sockaddr_in sd2;int sd2Size = sizeof(sd2);// acceptSOCKET clientFd = accept(fd, (sockaddr *)(&sd2), &sd2Size);if (clientFd == INVALID_SOCKET){cout << "客户端 socket error" << endl;}char buf[1024] = "";while (1){if (recv(clientFd, buf, 1024, 0) != 0){cout << "recv " << buf << endl;send(clientFd, buf, 1024, 0);// strcpy(buf, "");}}closesocket(clientFd);closesocket(fd);WSACleanup();return 0;
}

客户端：

#include <iostream>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")using std::cout;
using std::endl;
using std::cin;int main()
{WSADATA wsa;if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0){cout << "WSA Error" << endl;return 0;}// socket SOCKET fd = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);if (fd == INVALID_SOCKET){cout << "socket error" << endl;return 0;}sockaddr_in sd;sd.sin_family = AF_INET;sd.sin_port = htons(2345);sd.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");// connectif (connect(fd, (sockaddr *)(&sd), sizeof(sd)) == SOCKET_ERROR){cout << "connect error" << endl;return 0;}while (1){char buf[1024];cout << "请输入数据:" << endl;cin >> buf;send(fd, buf, 1024, 0);if (recv(fd, buf, 1024, 0) > 0){cout << buf << endl;}}closesocket(fd);WSACleanup();getchar();return 0;
}

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