/* MeanFraction.java
**
** Author:   P. M. J. 
** Course:   CMPS 134
** Semester: Fall 2018
**
** Last Modified: November  5, 2018
** Collaboration: R. W. M.
**
** Java application that reads a text file containing a sequence of fractions,
** one per line, determines the mean of these values and prints that result.
**
*/

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class MeanFraction {
   
   public static void main(String[] args) throws FileNotFoundException {
   
      // Use the first run-value argument as the name of the file to be read
      String fileID = args[0];
      Scanner input = new Scanner(new File(fileID));
      
      Fraction total = new Fraction(0,1);
      int count = 0;
      
      // Loop to read and process each value value
      while(input.hasNextLine()) {
         count = count + 1;
         // Read the next line from the input as a string
         String line = input.nextLine().trim();
         // Construct a new object to represent this value
         Fraction value = new Fraction(line);
         // Add to the total and print the running value
         total.addTo(value);
         System.out.println(count + ") \"" + line + "\" aka " +
                            value.toString() + " accumulates to " + total.toString());
      }
      
      // Determine and print the result
      System.out.print("The mean value is ");
      if(count > 0) {
         Fraction countAsFraction = new Fraction(count,1);
         total.divideBy(countAsFraction);
         System.out.println(total);
      } else {
         System.out.println("unknown!");
      }
      System.out.println();
   }
   
}