Narrowed Down Problem - Need help with Interface Constructor

Question

I'm storing the following information about a small car:
max speed = 100
fuel efficiency = 50
mpg = 30
reliability factor = 7

I have a class SmallCar that inherits a IVehicle interface. I'm stuck on how to add the constructors. Can someone please help:
[code]
namespace Assets.Classes
{
public interface IVehicle
{
int MaxSpeed { get; set;}
int FuelEfficiency {get; set;}
double ReliabilityFactor { get; set; }
double LifeSpan { get; set; }
}

public class SmallCar : IVehicle
{

protected int maxSpeed { get; set; }
protected int fuelEfficiency { get; set; }
protected double reliabilityFactor { get; set; }
protected double lifeSpan { get; set; }

class SmallCar : IVehicle
Here's where I'm stuck trying to add constructor logic
}

}

}

[/code]

Vulpes · Answer

A class which implements an interface must implement its members as public (not protected) members and the names of the implemented members must be exactly the same as in the interface: using System; namespace Assets.Classes { public interface IVehicle { int MaxSpeed { get; set;} int FuelEfficiency {get; set;} double ReliabilityFactor { get; set; } double LifeSpan { get; set; } } public class SmallCar : IVehicle { public int MaxSpeed { get; set; } public int FuelEfficiency { get; set; } public double ReliabilityFactor { get; set; } public double LifeSpan { get; set; } // constructor public SmallCar(int maxSpeed int fuelEfficiency double reliabilityFactor double lifeSpan) { MaxSpeed = maxSpeed; FuelEfficiency = fuelEfficiency; ReliabilityFactor = reliabilityFactor; LifeSpan = lifeSpan; } } class Program { static void Main() { SmallCar car = new SmallCar(100 50 30 7); Console.WriteLine(Maximum Speed {0} car.MaxSpeed); Console.WriteLine(Fuel Efficiency {0} car.FuelEfficiency); Console.WriteLine(Reliablilty Factor {0} car.ReliabilityFactor); Console.WriteLine(Life Span {0} car.LifeSpan); Console.ReadKey(); } } }

Jonathas Sucupira · Answer

You should create a base class and not interface on this case. Hope this helps. public enum EngineTypes { InternalCombustionEngines = 0 DieselEngines HybridVehicleEngines EletricEngine } public enum FuelTypes { Gasoline = 0 Ethanol Methanol Eletric } public enum VehicleType { SmallCar = 0 MidSize SUV PickupTruck Truck Motocycle } public class Vehicle { public int MaxSpeed { get; set; } public double ReliabilityFactor { get; set; } public string Manufacturer { get; set; } public VehicleType CarType { get; set; } public int FuelEfficiency { get; private set; } public FuelTypes Fuel {get;set;} public EngineTypes Engine { get; set; } public void CalculateFuelEfficiency() { if (Fuel == FuelTypes.Gasoline) { switch (Engine) { case EngineTypes.InternalCombustionEngines: if (CarType == VehicleType.SmallCar) { FuelEfficiency = 34; } break; case EngineTypes.DieselEngines: break; case EngineTypes.HybridVehicleEngines: break; case EngineTypes.EletricEngine: break; default: break; } } } } public class SmallCar : Vehicle { public const double LifeSpan = 5; public SmallCar() { Fuel = FuelTypes.Gasoline; Engine = EngineTypes.InternalCombustionEngines; MaxSpeed = -1; ReliabilityFactor = -1; Manufacturer = string.Empty; CarType = VehicleType.SmallCar; } } class Program { static void Main(string[] args) { var civic = new SmallCar { Fuel = FuelTypes.Gasoline Engine = EngineTypes.InternalCombustionEngines Manufacturer = Honda MaxSpeed = 88 ReliabilityFactor = 7.5 }; civic.CalculateFuelEfficiency(); Console.Write(The fuel Efficiency is {0} civic.FuelEfficiency); Console.Read(); } }