using System;

​

//Mortgage class

public class Mortgage

{

    //declare variables

    private double amount;

    public double loanAmount

    {

        get

        {

            return amount;

        }

        set

        {

            amount = value;

        }

    }

    private double rate;

    public double loanRate

    {

        get

        {

            return rate;

        }

        set

        {

            rate = value;

        }

    }

    private double terms;

    public double loanTerms

    {

        get

        {

            return terms;

        }

        set

        {

            terms = value;

        }

    }

    //methods

    public double CalcPayment()

    {

        return Math.Round((loanAmount) * ((loanRate/12) * Math.Pow(1 + (loanRate/12), loanTerms)) / (Math.Pow(1 + (loanRate/12), loanTerms) - 1), 2); 

    }

    public double CalcTotalCost()

    {

        return Math.Round(((loanAmount) * ((loanRate/12) * Math.Pow(1 + (loanRate/12), loanTerms)) / (Math.Pow(1 + (loanRate/12), loanTerms) - 1))*loanTerms, 2);

    }

    public double CalcInterest()

    {

        return Math.Round((((loanAmount) * ((loanRate/12) * Math.Pow(1 + (loanRate/12), loanTerms)) / (Math.Pow(1 + (loanRate/12), loanTerms) - 1))*loanTerms)-loanAmount, 2);

    }

    //default constructor

    public Mortgage()

    {

        loanAmount = 1;

        loanRate = 1;

        loanTerms = 1;

    }

    //allow values to be read from user input and plugged in as the variables

    public Mortgage(double p, double i, int n)

    {

        loanAmount = p;

        loanRate = i;

        loanTerms = n;

    }

    //test

    public static void Main()

    {

        Mortgage mortgage = new Mortgage();

        Console.WriteLine("Please Enter the loan amount: ");

        double p;

        double.TryParse(Console.ReadLine(), out p);

        Console.WriteLine("Please Enter the loan rate in decimal form (eg. 4.5% = .045): ");

        double i;

        double.TryParse(Console.ReadLine(), out i);

        Console.WriteLine("Please Enter the loan terms (in months): ");

        double n;

        double.TryParse(Console.ReadLine(), out n);

        mortgage.loanAmount = p;

        mortgage.loanRate = i;

        mortgage.loanTerms = n;

        Console.WriteLine("------------------------------------------");

        Console.WriteLine("Your monthly payment would be: $" + mortgage.CalcPayment());

        Console.WriteLine("Your total cost would be: $" + mortgage.CalcTotalCost());

        Console.WriteLine("Your total interest paid would be: $" + mortgage.CalcInterest());

    }

}