C++ Socket服务器简单代码示例

C++ Socket服务器简单代码示例

#include <WinSock2.h>#include <stdio.h>#pragma comment(lib,"ws2_32.lib")//服务器端void main(){       WSADATA wsaData;        int errorCode = WSAStartup(MAKEWORD(1,1),&wsaData);    if (errorCode != 0)        return;    SOCKET acceptSocket = socket(AF_INET,SOCK_STREAM,0);     SOCKADDR_IN addr;    addr.sin_family = AF_INET;    addr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);    addr.sin_port = htons(6001);        //端口号    errorCode = bind(acceptSocket,(SOCKADDR*)&addr,sizeof(SOCKADDR));       if (errorCode != 0)        return;    errorCode = listen(acceptSocket,5);    if (errorCode != 0)        return;    SOCKADDR_IN sockAddr;    int len = sizeof(SOCKADDR);    char recvBuf[5000] = {0};    char sendBuf[5000] = {0};    while (true)    {        SOCKET clientSocket = accept(acceptSocket,(SOCKADDR*)&sockAddr,&len);        if (clientSocket == INVALID_SOCKET)        {            Sleep(100);            continue;        }        memset(sendBuf,0,5000);        sprintf(sendBuf,"%s is Connected!\r\n",inet_ntoa(sockAddr.sin_addr));        printf(sendBuf);        while(true)        {            memset(recvBuf,0,5000);            memset(sendBuf,0,5000);            int ret = recv(clientSocket,recvBuf, 4999,0);            if (ret < 0)                break;                  sprintf(sendBuf,"Hello %s ,message recved!\r\n",inet_ntoa(sockAddr.sin_addr));            printf(sendBuf);            ret = send(clientSocket,sendBuf, strlen(sendBuf),0);            if (ret < 0)                break;          }        memset(sendBuf,0,5000);        sprintf(sendBuf,"%s is Closed!\r\n",inet_ntoa(sockAddr.sin_addr));        printf(sendBuf);        closesocket(clientSocket);    }    closesocket(acceptSocket);    WSACleanup();}