//  Interest.java  (c) 2004 Kari Laitinen

//  http://www.naturalprogramming.com

//  2004-10-10  File created.
//  2004-12-19  Last modification.

import java.util.* ;

class Interest
{
   public static void main( String[] not_in_use )
   {
      Scanner keyboard = new Scanner( System.in ) ;

      double[][]  compound_interest_table  =
      {
        { 5.00, 10.25, 15.76, 21.55, 27.63, 34.01, 40.71, 47.75 },
        { 6.00, 12.36, 19.10, 26.25, 33.82, 41.85, 50.36, 59.38 },
        { 7.00, 14.49, 22.50, 31.08, 40.26, 50.07, 60.58, 71.82 }
      } ;

      double given_sum_of_money ;
      int    interest_percentage,  loan_period_in_years ;

      System.out.print( "\n This program calculates the compound interest"
                     +  "\n for a given sum of money (principal). \n"
                     +  "\n  Give the loan amount: " ) ;
      given_sum_of_money   =  keyboard.nextDouble() ;

      System.out.print( "\n  Give the interest percentage (5, 6, or 7): ");
      interest_percentage   =  keyboard.nextInt() ;

      System.out.print( "\n  Give the loan period in years (max. 8): ") ;
      loan_period_in_years  =  keyboard.nextInt() ;

      System.out.print( "\n  For a loan of "  +  given_sum_of_money 
                     +  " you must pay \n  "
                     +  ( given_sum_of_money / 100.0 ) *
                        compound_interest_table[ interest_percentage - 5 ]
                                               [ loan_period_in_years - 1 ] 
                     +  " as compound interest after "
                     +  loan_period_in_years  +  " years." ) ;
   }
}