/* Stats.java
 * Let's read some numbers from a file, and then find the average.
 * Assume that the input is in a file called stats.in.
 */
import java.util.Scanner;			// for input
import java.io.FileInputStream;		// for reading files
import java.io.FileNotFoundException;	// in case file doesn't exist!

public class Stats
{
  public static void main(String [] args) throws FileNotFoundException
  {
    Scanner inFile = new Scanner(new FileInputStream("stats.in"));

    // Need to keep track of how many numbers read, as well as sum.
    int howMany = 0;
    double sum = 0.0;

    // Keep reading numbers until finished reading the file.
    while(inFile.hasNextDouble())
    {
      double nextNumber = inFile.nextDouble();
      howMany = howMany + 1;
      sum = sum + nextNumber;
    }

    // We're done reading the file, so figure the average, and output.
    double average = sum / howMany;

    System.out.printf("The average of your %d numbers is %.1f\n",
                      howMany, average);
  }
}