public static double Calculate(CompoundInterestContext context)
{
double p = context.Principal;
double r = context.InterestPercent / 100.0;
int n = context.CompoundingFrequency;
int t = context.InvestYears;
double sum = p * Math.Pow(1 + r / n, n * t);
return(Math.Round(sum, 2));
}
static void Main(string[] args)
{
Console.Write("What is the principal amount? ");
string principalInput = Console.ReadLine();
Console.Write("What is the rate: ");
string rateInput = Console.ReadLine();
Console.Write("What is the number of years: ");
string yearsInput = Console.ReadLine();
Console.WriteLine("What is the number of times the interest\n" +
"is compounded per years: ");
string frequencyInput = Console.ReadLine();
double principal;
double.TryParse(principalInput, out principal);
double interestPercent;
double.TryParse(rateInput, out interestPercent);
int years;
int.TryParse(yearsInput, out years);
int frequency;
int.TryParse(frequencyInput, out frequency);
var context = new CompoundInterestContext
{
Principal = principal,
InterestPercent = interestPercent,
InvestYears = years,
CompoundingFrequency = frequency,
};
double sum = CompoundInterest.Calculate(context);
Console.WriteLine(
$"${principal} invested at {interestPercent}% for {years} years");
Console.WriteLine(
$"compounded {frequency} times per year is ${sum}");
}