Exemple #1
0
        static void Main(string[] args)
        {
            var loan = Loan.GetLoanData();

            var calculatedResult = LoanCalculatedResult.Calculate(loan);

            calculatedResult.PrintResults();

            Console.ReadLine();
        }
        /// <summary>
        /// Make calculations of the loan and returns calculated results such as total payment, monthly payment, total interest amount and administration fee(one-time) amount.
        /// </summary>
        /// <param name="loan">Model with terms for the loan. Typeof <see cref="Loan"/>.</param>
        /// <returns>Returns model typeof <see cref="LoanCalculatedResult"/>.</returns>
        public static LoanCalculatedResult Calculate(Loan loan)
        {
            var loanResult = new LoanCalculatedResult
            {
                MonthlyInterestRate = loan.AnnualInterestRate / 100 / 12
            };

            loanResult.MonthlyLoanAmount = loan.Amount * (loanResult.MonthlyInterestRate +
                                                          (loanResult.MonthlyInterestRate / (Math.Pow(1 + loanResult.MonthlyInterestRate, loan.DurationMonths) - 1)));
            loanResult.TotalPayment            = loanResult.MonthlyLoanAmount * loan.DurationMonths;
            loanResult.TotalInterestRateAmount = loanResult.TotalPayment - loan.Amount;
            loanResult.AdministrationFeeAmount = ((loan.Amount * loan.AdministrationFeePercentage / 100) > loan.MaximalAdministrationFeeAmount) ?
                                                 loan.MaximalAdministrationFeeAmount : loan.Amount * loan.AdministrationFeePercentage / 100;

            return(loanResult);
        }