//Hermione K.

//Date: May 3 - May

//Project: Billionaire

//Description: Seeing how many years it would take your investments to become a billion, basically how many years it would take you to be a billionaire 

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Billionaire");

        Console.WriteLine(new String ('-', 50));

        //Taking in the Principle investment, what they would like to have from the start

        Console.WriteLine("How much would you like to invest? (Principle Investment)");

        double Pvalue= Convert.ToDouble(Console.ReadLine());

        //How much it would go up every year

        Console.WriteLine("What is your investment rate?(Must be Positive and in %)");

        double Rvalue= Convert.ToDouble(Console.ReadLine());

        //Displaying the yearly balance

        Console.WriteLine("Your Yearly Balance is : ");

        Console.WriteLine(new String ('-',24));

        Console.WriteLine("{0,-10} {1,60} {2,60}", "Year", "Interest", "Balance");//display the title of the interests and balance chart

        Console.WriteLine(new string ('-',133));

        //Variable for how many years it would take 

        int year=0;

        //Variable for the interests

        double interest=0;

        //variable for the total

        double total=0; 

        do //The loop for calculating the interest for over the years, trying to find how many years it would take to become a billionaire  

        {

            year++;//update how years are taken

            total = Pvalue* Math.Pow(1+Rvalue/100,year);//Calculating the total amount

            interest = Pvalue* Math.Pow(1+Rvalue/100,year) -  Pvalue* Math.Pow(1+Rvalue/100,year-1) ;//calculates the interests

            Console.WriteLine("{0,-10} {1,60} {2,60:C2}", year, interest, total);//Displays the year, interest and the total

​

        }while (total<=1000000000);//stop repeating once the total gets to a billion

        Console.WriteLine(new String ('-',133));

        Console.WriteLine("It will take " + year + " years for you to become a billionaire");//display how many years are needed to make 1 billion

​

    }

}