// Introduction to Software Testing
// Authors: Paul Ammann & Jeff Offutt
// Chapter 5, section 5.2, page 189

import java.io.*;

class findVal
{

//Effects: If numbers null throw NullPointerException     
//   else return LAST occurrence of val in numbers[]       
//   If val not in numbers[] return -1                     
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 findLast 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
       
}