import java.io.*;

class hiThere{
	public static void main (String [] args) throws Exception {
		InputStreamReader isr = new InputStreamReader(System.in);
		FileReader fr = new FileReader("ouchy.txt");
		//BufferedReader br = new BufferedReader(isr);
		BufferedReader br = new BufferedReader(fr);
		FileOutputStream fos = new FileOutputStream("amazing.txt");
		PrintWriter screenPw = new PrintWriter(System.out, true);
		PrintWriter pw = new PrintWriter(fos, true);
		
		//screenPw.println("Please enter a number");
		screenPw.println("..... reading lines from the file .....");
		String inputty = "something";
		int number = 42, n, count = 0;
		
		inputty = br.readLine();
		while(inputty != null) {
		
			try {
				number = Integer.parseInt(inputty);
				count = count + 1;
			} catch (NumberFormatException nfe) {
				pw.println(nfe.getLocalizedMessage());
				pw.println("oops -- that (ie \""+inputty+"\") was a weird integer??!   Bye bye");
				//System.exit(1);
			}
	
			n = number * 2 ;
			pw.println("Doubling " + number + " gives " + n);
			
			inputty = br.readLine();
			//Thread.sleep(1000);
		} // end while loop
		

		screenPw.println("All done -- bye for now! (I did " + count + " calculations");
	}
}