static void Main(string[] args)
{
Invoice inv = new Invoice();
inv.GrossAmmount = 100;
inv.NetPayableCalculator = new LocalPayable();
System.Console.WriteLine("When Calculator is Local");
System.Console.WriteLine(inv.NetAmount.ToString());
inv.NetPayableCalculator = new IntlPayable();
System.Console.WriteLine("When Calculator is International");
System.Console.WriteLine(inv.NetAmount.ToString());
}
public override double CalculateTotal(Invoice inv)
{
return inv.GrossAmmount + 0.04 * inv.GrossAmmount;
}
public abstract double CalculateTotal(Invoice inv);
