// HowRich.java
// Solution to CS 5 Short Assignment #2 by THC.
// Computes the balance in year n for $1.00 deposited in year 0, where
// the interest rate compounds at 5% per year. Also computes how many Berry
// Libraries we can build with that amount, where each Berry Library costs
// $50,000,000.

import java.util.Scanner;

public class HowRich {
  public static void main(String[] args) {
    // 5% interest per year.
    final double INTEREST_RATE = 0.05;

    // The starting balance in year 0;
    final double INITIAL_BALANCE = 1.0;

    double balance = INITIAL_BALANCE; // current balance

    // The year in which we want the balance.
    int targetYear;

    // Get the year from the user.
    System.out.print("In what year would you like to know the balance? ");
    Scanner input = new Scanner(System.in);
    targetYear = input.nextInt();

    // Compound the balance once per year.
    for (int year = 1; year <= targetYear; year++)
      balance = balance * (1.0 + INTEREST_RATE);

    System.out.println("In the year " + targetYear + ", the balance is $"
        + balance + ".");

    final double BERRY_COST = 50000000; // cost of Berry Library

    System.out.println("You could build " + (balance / BERRY_COST)
        + " Berry Libraries with that.");
  }
}