/* Java class whose only purposes are to test the SquareRootCalc class
   and to illustrate exception handling.
*/

//import java.io.*;
import java.io.IOException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.BufferedReader;
import java.text.NumberFormat;
import java.util.Scanner;

public class SqRootDriver {

   public static void main(String[] args) throws IOException {

      Scanner keyboard = new Scanner(System.in); 
      File f = new File("junk.txt");
      BufferedReader br = null;
 

      try {
         br = new BufferedReader(new FileReader(f));
              //new BufferedReader(new InputStreamReader(f));
      }
      catch (FileNotFoundException e) {
         System.out.println("There is no file of the specified name.");
         System.out.println("Program aborting.");
         System.exit(1);
      }

      NumberFormat nf = NumberFormat.getInstance();

      SquareRootCalc s = new SquareRootCalc();

      String response = br.readLine();
      while (response != null) {
 
         System.out.println("Next input = " + response);
         //System.out.println("Hit enter");
         //keyboard.nextLine();
 
         try {
            // next line could cause a NumberFormatException to be thrown
            long n = Long.parseLong(response);

            // next line could cause an IllegalArgumentException to be thrown
            long sqrtOfn = s.sqrt(n);

            System.out.println("floor of square root of " +
                               n + " is " + nf.format(sqrtOfn));

            if (squareOf(sqrtOfn) <= n  &&  squareOf(sqrtOfn+1) > n) {
               // answer is correct, so do nothing
            }
            else {
               System.out.println("ERROR: Wrong answer!!");
            }
         }
         catch (NumberFormatException e) {
            System.out.println("Your input was not an integer, you idiot!");
         }
         catch (IllegalArgumentException e) {
            System.out.println(e.toString());
         }
         finally {
            System.out.println();
         }
         // read next input
         response = br.readLine();
      }   // while
   }  // main

   private static long squareOf(long k) { return k*k; }

}