static void Main(string[] args)
{
ShippingFeesDelegate feesDelegate;
ShippingDestination destination;
string zoneInput;
do
{
// get the destination zone
Console.WriteLine("What is the destination zone? (1, 2, 3, etc.)");
zoneInput = Console.ReadLine();
// if the user wrote "exit" then terminate the program,
// otherwise continue
if (!zoneInput.Equals("exit"))
{
// given the zone, retrieve the associated shipping info
destination = ShippingDestination.GetDestinationInfo(zoneInput);
// if there's no associated info, then the user entered
// an invalid zone, otherwise continue
if (destination != null)
{
// ask for the price and convert the string to a decimal number
Console.WriteLine("What is the item price?");
string priceInput = Console.ReadLine();
decimal itemPrice = decimal.Parse(priceInput);
// Each ShippingDestination object has a function called calcFees,
// use that as the delegate for calculating the fee
feesDelegate = destination.CalcFees;
// For high-risk zones, we tack on the delegate that adds the high risk fee
if (destination.IsHighRisk)
{
feesDelegate += delegate(decimal thePrice, ref decimal itemFee)
{
itemFee += 25.0m;
};
}
// Now all that is left to do is call the delegate and output
// the shipping fee to the Console
decimal theFee = 0.0m;
feesDelegate(itemPrice, ref theFee);
Console.WriteLine($"The shipping fees are: ${theFee}" + Environment.NewLine);
}
else
{
Console.WriteLine("You have entered an uknown destination. Please try again or 'exit'");
}
}
}while (zoneInput != "exit");
}
static void Main(string[] args)
{
ShippingFeesDelegate theDel;
ShippingDestination theDest;
string theZone;
do
{
// get the destination zone
Console.WriteLine("What is the destination zone?");
theZone = Console.ReadLine();
// if the user wrote "exit" then terminate the program,
// otherwise continue
if (!theZone.Equals("exit"))
{
// given the zone, retrieve the associated shipping info
theDest = ShippingDestination.GetDestinationInfo(theZone);
// if there's no associated info, then the user entered
// an invalid zone, otherwise continue
if (theDest != null)
{
// ask for the price and convert the string to a decimal number
Console.WriteLine("What is the item price?");
string thePriceStr = Console.ReadLine();
decimal itemPrice = decimal.Parse(thePriceStr);
// Each ShippingDestination object has a function called calcFees,
// use that as the delegate for calculating the fee
theDel = theDest.CalcFees;
// For high-risk zones, we tack on the delegate that adds more
if (theDest.m_isHighRisk)
{
theDel += delegate(decimal thePrice, ref decimal itemFee) {
itemFee += 25.0m;
};
}
// now all that is left to do is call the delegate and output
// the shipping fee to the Console
decimal theFee = 0.0m;
theDel(itemPrice, ref theFee);
Console.WriteLine("The shipping fees are: {0}", theFee);
}
else
{
Console.WriteLine("Hmm, you seem to have entered an uknown destination. Try again or 'exit'");
}
}
} while (theZone != "exit");
}