// program to read in real numbers from a file and print
//   the sum of all the numbers on each line and the total
//   of all numbers in the file

import java.util.*;
import java.io.*;

public class SumFile {
   public static void main(String[] args) throws FileNotFoundException {
      Scanner file = new Scanner(new File("numbers.txt"));
      double fileSum = 0;
      
      // read each double
      // add to sum
      // stop....when?
      
      // next(), nextInt(), ...
      // nextLine()
      while (file.hasNextLine()) {
         String line = file.nextLine();
         Scanner nums = new Scanner(line);
         double lineSum = 0;
         
         while (nums.hasNextDouble()) {
            double num = nums.nextDouble();
            lineSum += num;
         }
         
         fileSum += lineSum;
         System.out.println("line sum = " + lineSum);
      }
      
      System.out.println("file sum = " + fileSum);
   }
}