// Fig 16.5: BinarySearchTest.java
// Use binary search to locate an item in an array.
import java.util.Scanner;

public class BinarySearchTest
{
   public static void main( String args[] )
   {
      // create Scanner object to input data
      Scanner input = new Scanner( System.in );
      
      int searchInt; // search key
      int position; // location of search key in array
   
      // create array and output it
      BinaryArray searchArray = new BinaryArray( 15 );
      System.out.println( searchArray );

      // get input from user
      System.out.print( 
         "Please enter an integer value (-1 to quit): " );
      searchInt = input.nextInt(); // read an int from user
      System.out.println();

      // repeatedly input an integer; -1 terminates the program
      while ( searchInt != -1 )
      {
         // use binary search to try to find integer
         position = searchArray.binarySearch( searchInt );

         // return value of -1 indicates integer was not found
         if ( position == -1 )
            System.out.println( "The integer " + searchInt + 
               " was not found.\n" );
         else
            System.out.println( "The integer " + searchInt + 
               " was found in position " + position + ".\n" );

         // get input from user
         System.out.print( 
            "Please enter an integer value (-1 to quit): " );
         searchInt = input.nextInt(); // read an int from user
         System.out.println();
      } // end while
   } // end main
} // end class BinarySearchTest


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