//下面程序是书籍的例题的，感觉里面宏定义好多，好多信息都不够直观，找起来特麻烦，若想做外挂、单机软件这些工具，需要学这些复杂的东西吗
#include<stdio.h>
#include<winsock.h>            

int  main()
{
    char Sendbuf[100];   
    char Receivebuf[100];        
    int SendLen;            
    int ReceiveLen;            
    int Length;               

    SOCKET socket_server;        
    SOCKET socket_receive;      

    SOCKADDR_IN Server_add;        
    SOCKADDR_IN Client_add;        

    WORD wVersionRequested;        
    WSADATA wsaData;        
    int error;

    wVersionRequested = MAKEWORD( 2, 2 );            

    error = WSAStartup( wVersionRequested, &wsaData);   
    if(error!=0)
    {
        printf("加载套接字失败！");
        return 0;   
    }                                

    if(LOBYTE(wsaData.wVersion)!=2||HIBYTE(wsaData.wVersion)!=2)     
    {
        WSACleanup();
        return 0;        
    }                                

    Server_add.sin_family=AF_INET;                                
    Server_add.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
    Server_add.sin_port=htons(5000);               

    socket_server=socket(AF_INET,SOCK_STREAM,0);


    if(bind(socket_server,(SOCKADDR*)&Server_add,sizeof(SOCKADDR) )==SOCKET_ERROR)
    {
        printf("绑定失败\n");
    }



    if(listen(socket_server,5)<0)
    {
        printf("监听失败\n");
    }
   

    Length=sizeof(SOCKADDR);

    socket_receive=accept(socket_server,(SOCKADDR*)&Client_add,&Length);
    if(socket_receive==SOCKET_ERROR)
    {
        printf("接受连接失败");
    }


    while(1)                        
    {   
        
        ReceiveLen =recv(socket_receive,Receivebuf,100,0);
        if(ReceiveLen<0)
        {
            printf("接收失败\n");
            printf("程序退出\n");
            break;
        }
        else
        {
            printf("client say: %s\n",Receivebuf);
        }   
        
        printf("please enter message:");
        scanf("%s",Sendbuf);
        SendLen=send(socket_receive,Sendbuf,100,0);
        if(SendLen<0)
        {
            printf("发送失败\n");
        }
    }


    closesocket(socket_receive);   
    closesocket(socket_server);
    WSACleanup();
    return 0;
}

那我就先把这章跳过去了