// Introduction to Software Testing
// Authors: Paul Ammann & Jeff Offutt
// Chapter 9; page 13
// Can be run from command line
// No JUnit tests at this time.

import java.io.*;

public class FindVal
{
 /**
   * Find last index of element
   * 
   * @param numbers array to search
   * @param val value to look for
   * @return last index of val in numbers; -1 if absent
   * @throws NullPointerException if numbers is null
   * Note: Same specification as findLast, but slightly different implementation
   */
   public static int findVal(int numbers[], int val)       
   {                                                       
      int findVal = -1;                                    
                                                        
      for (int i=0; i<numbers.length; i++)                 
      // for (int i=(0+1); i<numbers.length; i++)
         if (numbers [i] == val)                         
            findVal = i;                                  
         return (findVal);                                    
   }
   
   public static void main (String []argv)
   {  // Driver method for findVal
      // Read an array and an integerfrom standard input, call findVal()
      int integer = 0;
      int []inArr = new int [argv.length];
      if (argv.length == 0)
      {
         System.out.println ("Usage: java FindVal v1 [v2] [v3] ... ");
         return;
      }
   
      for (int i = 0; i< argv.length; i++)
      {
         try
         {
            inArr [i] = Integer.parseInt (argv[i]);
         }
         catch (NumberFormatException e)
         {
            System.out.println ("Entry must be a integer, using 1.");
            inArr [i] = 1;
         }
      }
      
      System.out.println ("Enter an integer you want to find: ");
      integer = getN();
   
      System.out.println ("The LAST occurrence of " + integer + " is: " + findVal (inArr, integer));
   }
   
   // ====================================
   // Read (or choose) an integer
   private static int getN ()
   {
      int inputInt = 1;
      BufferedReader in = new BufferedReader (new InputStreamReader (System.in));
      String inStr;
   
      try
      {
         inStr    = in.readLine ();
         inputInt = Integer.parseInt(inStr);
      }
      catch (IOException e)
      {
         System.out.println ("Could not read input, choosing 1.");
      }
      catch (NumberFormatException e)
      {
         System.out.println ("Entry must be a number, choosing 1.");
      }
   
      return (inputInt);
   }  // end getN
}