import java.io.*;

class Average10
{
/*
 A program that calculates the average of a series of integers read
 from a file. The integers are read until the end of file is encountered.
 The program prompts for the name of the file the numbers are to be read
 from.
*/
  
 public static void main(String[] args) throws IOException
 {
  BufferedReader in = Text.open(System.in);
  BufferedReader fileReader;
  String filename="";
  int sum=0,count=0,n;
  for(;;)
     {
      try
         {
          System.out.print("Enter file name to read from: ");
          filename=Text.readString(in);
          fileReader=Text.open(filename);
          break;
         }
      catch(FileNotFoundException e)
         {
          System.out.println("File "+filename+" not found");
         }
     }
  try
     {
      for(;;)
         {
          n=Text.readInt(fileReader);
          sum+=n;
          count++;
         }
     }
  catch(EOFException e)
     {
      System.out.print("Average is: "+Text.writeDouble((double)sum/count,5,3));
      System.out.println();
     }
 }
}