Linux Socket±à³ÌʵÀý(Ò»¸öHello World³ÌÐò)

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/**
 * Tcp Server program, It is a simple example only.
 * zhengsh 200520602061 2
 * when client connect to server, send a welcome message and timestamp in server.
 */
#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <time.h>
#define SERVER_PORT 20000 // define the defualt connect port id
#define LENGTH_OF_LISTEN_QUEUE 10 //length of listen queue in server
#define BUFFER_SIZE 255
#define WELCOME_MESSAGE "welcome to connect the server. "
int main(int argc, char **argv)
{
       int servfd,clifd;
       struct sockaddr_in servaddr,cliaddr;
       if ((servfd = socket(AF_INET,SOCK_STREAM,0)) < 0)     //³É¹¦½¨Á¢socket
       {
              printf("create socket error!\n");
              exit(1);
       }
       bzero(&servaddr,sizeof(servaddr));
       servaddr.sin_family = AF_INET;
       servaddr.sin_port = htons(SERVER_PORT);
       servaddr.sin_addr.s_addr = htons(INADDR_ANY);
       if (bind(servfd,(struct sockaddr*)&servaddr,sizeof(servaddr))