import java.io.*;

class Thursday07 {
	
	final static int DEFAULT_SIZE = 1000000;
	static double [] inputs;
	
	public static void main (String [] args) {
		// I/O stuff setup
		PrintWriter pw = new PrintWriter (System.out, true);
		
		inputs = new double[DEFAULT_SIZE];
		double answer = 0;
		double [] tidiedInputs; // an array to hold the cleaned up input
		
		int howMany = grabStuff(); // ask for data	
		tidiedInputs = tidy(inputs, howMany); // shrink-wrapping the input
		
		for (int i=0; i<tidiedInputs.length; i++) { // add up all the data
			answer += tidiedInputs[i];
		}	
		pw.println("The average of the numbers is " + answer/howMany);
		
		tidiedInputs = tidy(inputs, grabStuff()); // grab more data
		answer = 1;
		for (int i=0; i<tidiedInputs.length; i++) { // multiply all the data
			answer *= tidiedInputs[i];
		}
		pw.println("The product of the numbers is " + answer);
		
		System.out.println("That's all for now.  Bye bye!");
			
	} // end main method
	
	public static int grabStuff () {
		InputStreamReader isr1 = new InputStreamReader (System.in);
		BufferedReader br1 = new BufferedReader (isr1);
		PrintWriter pw1 = new PrintWriter (System.out, true);
		
		pw1.println("Please enter a bunch of numbers -- decimals are ok. \n" +
		"Just enter any non-number to finish.");
		boolean timeToStop = false;
		int realSize = 0;
		do {
			try {
				inputs [realSize] = Double.parseDouble(br1.readLine());
				realSize++; // increments only if the previous line successful
			} // end try
			catch (NumberFormatException e) {
				if (realSize == 0) {
					pw1.println("oops!!  You didn't enter ANY numbers!!!");
					System.exit(1);
				} // end if no data given
				else {
					timeToStop = true;
				} // end else time to stop reading fresh data
			} // end catch non-number input 
			catch (IOException e) {
				System.exit(1);
			} // end catch io system messed up!
		} while(!timeToStop); // end do-while gathering data
		return realSize; // returns the number of actual numbers entered
	} // end grabStuff method for getting data from the keyboard
	
	public static double[] tidy (double [] messy, int bigness) {
		// a method to shrink-wrap an array of doubles
		double [] nice = new double [bigness];
		for (int i=0; i<nice.length; i++) {
			nice[i] = messy[i];
		} // end copying for loop
		messy = null;
		return nice;
	} // end tidy method
	
} // end class Thursday07