//  Interest.kt  Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2020-10-30  File created.

//  This program demonstrates the use of a multidimensional array in Kotlin.

fun main()
{
   // The opening parenthesis cannot be put to the following line.
   // -----------------------------------------------(

   val compound_interest_table = arrayOf<DoubleArray>(
   
     doubleArrayOf( 5.00, 10.25, 15.76, 21.55, 27.63, 34.01, 40.71, 47.75 ),
     doubleArrayOf( 6.00, 12.36, 19.10, 26.25, 33.82, 41.85, 50.36, 59.38 ),
     doubleArrayOf( 7.00, 14.49, 22.50, 31.08, 40.26, 50.07, 60.58, 71.82 )
   )

   print( "\n This program calculates the compound interest"
       +  "\n for a given sum of money (principal). \n"
       +  "\n  Give the loan amount: " )
       
   val given_sum_of_money   =  readLine()!!.toDouble()

   print( "\n  Give the interest percentage (5, 6, or 7): ")
   val interest_percentage   =  readLine()!!.toInt()

   print( "\n  Give the loan period in years (max. 8): ")
   val loan_period_in_years  =  readLine()!!.toInt()

   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.\n\n" ) 

}