import java.io.*;

import java.net.*;

class ptb2_client{

public static void main(String[] args) throws IOException

{

DatagramSocket clientSocket=new DatagramSocket();

InetAddress IPAddress=InetAddress.getByName("THANGNH-1989");

BufferedReader inFromUser=new BufferedReader(new InputStreamReader(System.in));

double a;

do{

System.out.print("nhap so a:");

a=Double.parseDouble(inFromUser.readLine());

if(a==0)

System.out.print("phai nhap a khac 0");

}while(a==0);

System.out.print("nhap so b:");

double b=Double.parseDouble(inFromUser.readLine());

System.out.print("nhap so c:");

double c=Double.parseDouble(inFromUser.readLine());

byte[] sendData=new byte[1024];

sendData=String.valueOf(a).getBytes();

DatagramPacket sendPacket=new DatagramPacket(sendData,sendData.length,IPAddress,6789);

clientSocket.send(sendPacket);

sendData=String.valueOf(b).getBytes();

sendPacket.setData(sendData);

sendPacket.setLength(sendData.length);

clientSocket.send(sendPacket);

sendData=String.valueOf(c).getBytes();

sendPacket.setData(sendData);

sendPacket.setLength(sendData.length);

clientSocket.send(sendPacket);

byte [] receiveData=new byte [1024];

DatagramPacket receivePacket=new DatagramPacket(receiveData,receiveData.length);

clientSocket.receive(receivePacket);

String f=new String(receivePacket.getData());

System.out.print(f);

clientSocket.close();

}

}