import java.io.*;
 
public class Tally{
 
    public static void main(String[] args){
        try{
            InputStreamReader isr = new InputStreamReader(System.in);
            BufferedReader br = new BufferedReader(isr);
            String nextLine = "";
            double sum = 0;
            double average = 0;
            int entries = 0;
            System.out.println("Enter a number or 0 to quit."); 
            while (!(nextLine = br.readLine()).equals("0")){
                try{
                    double nextNumber = Double.parseDouble(nextLine);
                    sum = sum + nextNumber;
                    entries++;
                    if (entries > 0) average = sum/entries;
                    System.out.println("Entry: " + String.valueOf(nextNumber) 
                        + "\tSum: " + String.valueOf(sum)
                        + "\tAverage: " + String.valueOf(average));
                }catch(NumberFormatException nfe){
                    System.err.println("That entry could not be converted to a number. Try again.");
                }
                System.out.println("Enter a number or 0 to quit."); 
            }
            System.out.println("Sum: " + String.valueOf(sum)
                        + "\tAverage: " + String.valueOf(average));
        }catch(IOException ioe){
            System.err.println("Uh oh");
        }
 
    }
 
 
}