cassone

package cassone;

import java.io.*;
import java.util.*;

public class Cassone {

    static double kmToMill(double km) {
        double mill = km * 1.6;
        return mill;
    }

    public static void main(String[] args) {


        try {
            RandomAccessFile fileKi = new RandomAccessFile("szamok.txt", "rw");
            Scanner bill = new Scanner(System.in);
            while (true) {
                double szam = bill.nextDouble();
                if(szam == -1)
                    break;
                System.out.println(kmToMill(szam) + "\n");
                fileKi.writeBytes(kmToMill(szam) + "\n");
            }
            fileKi.close();
        } catch(IOException e){
            System.err.println(e);
        }
    }
}