1、windows上加载socket库

链接输入ws2_32.lib

代码code：

#ifdef _WIN32
#include<windows.h>
#else
#include <sys/socket.h>
#include<sys/types.h>
#include<unistd.h>
#include<cstring>
#include<arpa/inet.h>
#include<netinet/in.h>
#define closesocket close
#endif
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<thread>
using namespace std;
class TcpThread
{
public:void Main(){char buf[1024] = { 0 };for (;;){int recvlen = recv(client, buf, sizeof(buf) - 1, 0);if (recvlen <= 0)break;buf[recvlen] = '\0';if (strstr(buf, "quit") != NULL){char re[] = "quit success\n";send(client, re, sizeof(re) + 1, 0);break;}int sendlen = send(client, "ok!!\n",sizeof("ok!!\n"), 0);printf("recv %s\n", buf);}closesocket(client);delete this;}int client = 0;
};
int main(int argc, char* argv[])
{
#ifdef _WIN32WSADATA ws;WSAStartup(MAKEWORD(2, 2), &ws);
#endif//调用句柄int sock = socket(AF_INET, SOCK_STREAM, 0);if (sock == -1){printf("create socket failed\n");return -1;}unsigned short port = 8181;if (argc > 1){port = atoi(argv[1]);}sockaddr_in saddr;saddr.sin_family = AF_INET;saddr.sin_port = htons(port);//转换字节序成网络字节序saddr.sin_addr.s_addr = htons(0);if (bind(sock, (sockaddr*)&saddr, sizeof(saddr)) != 0){printf("bind port %d failed\n", port);return -2;}printf("bind port %d success\n", port);//printf("[%d]", sock);listen(sock, 10);//第二个参数位套接字请求长度//端口号和地址for (;;){sockaddr_in caddr; //返回结构体大小和地址
#ifdef WIN32int len = sizeof(struct sockaddr);
#elsesocklen_t len = sizeof(caddr);
#endifint client = accept(sock, (sockaddr*)&caddr, &len); //这个sock建立链接if (client <= 0)break;printf("Aacept client %d\n", client);char* ip = inet_ntoa(caddr.sin_addr);unsigned short cport = ntohs(caddr.sin_port);printf("client ip is %s,port is %d\n", ip, port);TcpThread* th = new TcpThread;th->client = client;thread sth(&TcpThread::Main, th);//th入口函数sth.detach(); //线程分离}#ifdef _WIN32closesocket(sock);#elseclose(sock); #endif	//可以 define close closesocketgetchar();return 0;
}