how to write program to communicate client and server

See more:

C++

Ubuntu

sockets

hi,
in c++, i m doing socket programming in Ubuntu environment,

at this stage i m trying this,

client side:

do
{
  
   printf("Please enter the message:(Enter q for quit) ");
    bzero(buffer,256);
    fgets(buffer,255,stdin);
    n = write(sockfd,buffer,strlen(buffer));
    if (n < 0) 
         error("ERROR writing to socket");
    bzero(buffer,256);
    n = read(sockfd,buffer,255);
    if (n < 0) 
         error("ERROR reading from socket");
   if(buffer[0]=='q') 
     break;
   printf("%s\n",buffer);

}while(1) ;

server side:

do{
     bzero(buffer,256);
     n = read(newsockfd,buffer,255);
     if (n < 0) error("ERROR reading from socket");
     printf("Here is the message: %s\n",buffer);
     if(buffer[0]=='q')    
        break;
    
    printf("Please enter the message:(Enter q for quit) ");
    bzero(buffer,256);
    fgets(buffer,255,stdin);
   
      n = write(newsockfd,buffer,strlen(buffer));
     if (n < 0) error("ERROR writing to socket");
   }while(1); 

now each one can send one message then wait for response to send more messages,
i want to make a client server , so that they can chat through multiple lines at once. just like, yahoo and facebook chats..

plz suggest me something.. thanx in advance....