#include<sys/types.h>
//#include<sys/socket.h>
//#include<netinet/in.h>
//#include<netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <WinSock2.h>
 
#define PORTNUMBER 333

#pragma comment(lib,"ws2_32.lib")

#define QueueLen 6

int visits = 0;

int  main(int argc, char * argv[])
{
    WORD version;
    version = MAKEWORD(1, 1);
    WSADATA wsa;
    if(0 != WSAStartup(version, &wsa)){ //初始化socket()
        printf("WSAStartup error!\n");
        exit(0);
    }
//    struct hostent * ptrh;
    struct sockaddr_in servaddr;
    struct sockaddr_in clientaddr;
    int listenfd;
    int clientfd;
    int port;
    int alen;
   
    char buf[1000];
    memset(&servaddr, 0, sizeof(servaddr)); //初始化servaddr为0

    servaddr.sin_family = AF_INET;//主机地址标识的数据结构，使用TCP/IP协议
    servaddr.sin_addr.s_addr = INADDR_ANY;//32位的IP地址，网络字节顺序
    if(argc > 1){
        port = atoi(argv[1]);
    } else {
        port = PORTNUMBER;
    }
    if(port > 0){
        servaddr.sin_port = htons((unsigned short) port); //把端口转换成网络序
    } else {
        fprintf(stderr, "bad port number%d\n", argv[1]);
        exit(0);
    }
   
    listenfd =  socket(AF_INET, SOCK_STREAM, IPPROTO_IP ); //注册一个socket description
    DWORD error = GetLastError();
    if(listenfd < 0){
        fprintf(stderr, "socket createion failed!\n");
        exit(0);
    }
    if(bind(listenfd, (struct sockaddr *) & servaddr, sizeof(servaddr)) < 0){//绑定到端口
        fprintf(stderr, "bind failed!\n");
        exit(0);
    }
    if(listen(listenfd, QueueLen) < 0){//开始监听端口
        fprintf(stderr, "listen failed!\n");
        exit(0);
    }
    while(1){//主循环
        alen = sizeof(clientaddr);
        if((clientfd = accept(listenfd, (struct sockaddr*)&clientaddr, &alen)) < 0){//接受客户端的连接
            fprintf(stderr, "accept failed!\n");
            exit(0);
        }
        printf("连接成功！！！！");
        visits++;
        sprintf(buf, "This server has been connected %d time\n", visits);//把需要发送的数据放到缓冲区里面
        send(clientfd, buf, strlen(buf), 0);//发送数据到客户端
        closesocket(clientfd);
    }
    return 0;
}

不知道是不是用visiual c++就可以运行啦，我用的dev。。QAQ

visiual c++   可以编译运行

你为什么不肯贴出编译器告诉你的具体错误？比如

#pragma comment(lib,"ws2_32.lib")
warning: ignoring #pragma comment
undefined reference to `_imp__WSAStartup@8'
undefined reference to `_imp__htons@4'
undefined reference to `_imp__socket@12'
undefined reference to `_imp__bind@12'
undefined reference to `_imp__listen@8'
undefined reference to `_imp__accept@12'
undefined reference to `_imp__send@16'
undefined reference to `_imp__closesocket@4'

fprintf(stderr, "bad port number%d\n", argv[1]);
warning: format '%d' expects argument of type 'int', but argument 3 has type 'char *' [-Wformat=]

DWORD error = GetLastError();
warning: unused variable 'error'