Windows系统下C++socket TCP编程步骤

#include <stdio.h>

#include <Winsock2.h>

void main()

{

WORD wVersionRequested;

WSADATA wsaData;

int err;

wVersionRequested = MAKEWORD( 1, 1 );

err = WSAStartup( wVersionRequested, &wsaData );

if ( err != 0 ) {

  return;

}

if ( LOBYTE( wsaData.wVersion ) != 1 ||

        HIBYTE( wsaData.wVersion ) != 1 ) {

  WSACleanup( );

  return;

}

SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN addrSrv;

addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);

addrSrv.sin_family=AF_INET;

addrSrv.sin_port=htons(6000);

bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));

listen(sockSrv,5);

SOCKADDR_IN addrClient;

int len=sizeof(SOCKADDR);

while(1)

{

  SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);

  char sendBuf[50];

  sprintf(sendBuf,"Welcome %s to here!",inet_ntoa(addrClient.sin_addr));

  send(sockConn,sendBuf,strlen(sendBuf)+1,0);

  char recvBuf[50];

  recv(sockConn,recvBuf,50,0);

  printf("%s\n",recvBuf);

  closesocket(sockConn);

}

}

 

#include <stdio.h>
#include <Winsock2.h>
void main()
{
 WORD wVersionRequested;
 WSADATA wsaData;
 int err;
 
 wVersionRequested = MAKEWORD( 1, 1 );
 
 err = WSAStartup( wVersionRequested, &wsaData );
 if ( err != 0 ) {
  return;
 }
 
 if ( LOBYTE( wsaData.wVersion ) != 1 ||
        HIBYTE( wsaData.wVersion ) != 1 ) {
  WSACleanup( );
  return;
 }
 SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);
 
 SOCKADDR_IN addrSrv;
 addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
 addrSrv.sin_family=AF_INET;
 addrSrv.sin_port=htons(6000); connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); send(sockClient,"hello",strlen("hello")+1,0);
 char recvBuf[50]; recv(sockClient,recvBuf,50,0);
 printf("%s\n",recvBuf); 
 closesocket(sockClient);
 WSACleanup();
}