static InvestmentBasis GetInvestmentBasis(InvestmentBasis basis = null)
{
basis = basis ?? new InvestmentBasis();
if (!basis.InitialInvestment.HasValue)
{
Console.WriteLine("Please input your initial investment amount:");
var val = GetUserInputValue();
basis.InitialInvestment = val;
}
if (!basis.MonthlyContributions.HasValue)
{
Console.WriteLine("Please input your expected monthly contributions:");
var val = GetUserInputValue();
basis.MonthlyContributions = val;
}
if (!basis.Years.HasValue)
{
Console.WriteLine("Please input the number of years you plan to invest: (1 or more)");
var val = GetUserInputValue();
if (val == 0)
{
GetInvestmentBasis(basis);
}
basis.Years = (int)val;
}
return(basis);
}
static InvestmentReturn CalculateReturn(InvestmentBasis basis, double annualpr, int yearsToInvest)
{
var result = new InvestmentReturn
{
Total = basis.InitialInvestment.Value,
TotalWithoutGrowth = basis.InitialInvestment.Value + (basis.MonthlyContributions.Value * (12 * yearsToInvest)),
MonthlyPercentageRate = annualpr / 12d
};
for (int i = 0; i < 12 * yearsToInvest; i++)
{
var newMonthlyTotal = result.Total + basis.MonthlyContributions.Value;
var monthlyGrowth = newMonthlyTotal * result.MonthlyPercentageRate;
result.Total = newMonthlyTotal + monthlyGrowth;
result.Growth += monthlyGrowth;
}
return(result);
}
