// Processes an employee input file and outputs each employee's hours.
import java.io.*;    // for File
import java.util.*;  // for Scanner

public class UnderpaidTAsSearch {
	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) {
  	   	processLine(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) {
           return line;                      // we found them!
         }
       }
       return "";           // not found, so return an empty line
    }

    // Totals the hours worked by the person and outputs their info.
    public static void processLine(String line) {
       Scanner lineScan = new Scanner(line);
       int id = lineScan.nextInt();              // e.g. 456
       String name = lineScan.next();            // e.g. "Brad"
       double hours = 0.0;
       int days = 0;
       while (lineScan.hasNextDouble()) {
         hours += lineScan.nextDouble();
         days++;
       }

       System.out.println(name + " worked " + hours + " hours ("
                             + (hours / days) + " hours/day)");
    }
}