// This program searches an input file of employees' hours worked
// for a particular employee and outputs that employee's hours data.
import java.io.*;    // for File
import java.util.*;  // for Scanner

public class Hours3 {
   public static void main(String[] args) throws FileNotFoundException {
      Scanner console = new Scanner(System.in);
      System.out.print("Enter an ID: ");
      int searchId = console.nextInt();  // e.g. 456
      Scanner input = new Scanner(new File("hours.txt"));
      String line = findPerson(input, searchId);
      if (line.length() > 0) {
         processEmployee(line);
      } else {
         System.out.println("ID #" + searchId + " was not found");
      }
   }
   
   // Locates and returns the line of data about a particular person.
   public static String findPerson(Scanner input, int searchId) {
      while (input.hasNextLine()) {
         String line = input.nextLine();
         Scanner lineScan = new Scanner(line);
         int id = lineScan.nextInt();  // e.g. 456
         if (id == searchId) {
            // we found them!
            return line; 
         }
      }
      return "";  // not found, so return an empty line
   }
   
   // Totals the hours worked by the person and outputs their info.
   public static void processEmployee(String line) {
      Scanner lineScan = new Scanner(line);
      int id = lineScan.nextInt();    // e.g. 456
      String name = lineScan.next();  // e.g. "Brad"
      double totalHours = 0.0;
      int days = 0;
         while (lineScan.hasNextDouble()) {
         totalHours += lineScan.nextDouble();
         days++;
      }
      
      double average = totalHours / days;
      System.out.println(name + " worked " + totalHours + " hours ("
         + average + " hours/day)");
   }
}