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#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)
{
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))<0)
{
printf("bind to port %d failure!\n",SERVER_PORT);
exit(1);
}
if (listen(servfd,LENGTH_OF_LISTEN_QUEUE) < 0)
{
printf("call listen failure!\n");
&n
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