import java.io.*;

class Average3
{
// A program that calculates the average of a series of integers. 
// It prompts for each one then asks if there are any more.

 public static void main(String[] args) throws IOException
 {
  BufferedReader in = Text.open(System.in);
  int sum=0,count=0;
  char ch;
  do 
     {
      count++;
      System.out.print("Enter number "+count+": ");
      sum+=Text.readInt(in);
      do 
         {
          System.out.print("Do you want any more numbers? (y/n): ");
          ch=Text.readChar(in);
         }
      while(ch!='y'&&ch!='n');
     }
  while(ch=='y');
  System.out.println("Average is: "+Text.writeDouble((double)sum/count,5,3));
 }
}