????Linux???server????

#include <netinet/in.h>  
#include <sys/types.h>  
#include <sys/socket.h>  
#include <stdio.h>      
#include <stdlib.h>     
#include <string.h>     

#define HELLO_WORLD_SERVER_PORT    4000
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024

int main(int argc?? char **argv)
{
    struct sockaddr_in server_addr;
 int server_socket;
 int opt = 1;
 
    bzero(&server_addr??sizeof(server_addr));
 
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);
    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);

 /* create a socket */
    server_socket = socket(PF_INET??SOCK_STREAM??0);
    if( server_socket < 0)
    {
        printf("Create Socket Failed!");
        exit(1);
    }
 
    /* bind socket to a specified address*/
    setsockopt(server_socket?? SOL_SOCKET?? SO_REUSEADDR?? &opt?? sizeof(opt));
    if( bind(server_socket??(struct sockaddr*)&server_addr??sizeof(server_addr)))
    {
        printf("Server Bind Port : %d Failed!"?? HELLO_WORLD_SERVER_PORT);
        exit(1);
    }

    /* listen a socket */
    if(listen(server_socket?? LENGTH_OF_LISTEN_QUEUE))
    {
        printf("Server Listen Failed!");
        exit(1);
    }
 
 /* run server */
    while (1)
    {
        struct sockaddr_in client_addr;
  int client_socket; 
        socklen_t length;
  char buffer[BUFFER_SIZE];

  /* accept socket from client */
  length = sizeof(client_addr);
        client_socket = accept(server_socket?? (struct sockaddr*)&client_addr?? &length);
        if( client_socket < 0)
        {
            printf("Server Accept Failed! ");
            break;
        }
      
  /* receive data from client */
  while(1)
  {
   bzero(buffer?? BUFFER_SIZE);
   length = recv(client_socket?? buffer?? BUFFER_SIZE?? 0);
   if (length < 0)
   {
    printf("Server Recieve Data Failed! ");
    break;
   }
  
   if('q' == buffer[0])
   {
    printf("Quit from client! ");
    break;
   }
  
   printf("%s "?? buffer);
  }
 
        close(client_socket);
    }
 
    close(server_socket);
    return 0;
}

????Windows?????????vc6.0??????????Linux????????gccok?????gcc server.c -o server?????????linux??????./server??????Widnows???client?????????Windows??????????????????Linux???????????????????????q???ɡ???????server????????????????????client????????????????????????????

?????????server??client?????????????????????????????????л?????????????????????