Plz Clear my dout -Interface & Abstract

Question

Hello all (please try to give possible way to slove this.) An abstract class called HotDrink that has the methods Drink()  AddMilk()  and AddSugar()  and the properties Milk  and Sugar . An interface called ICup that has the methods Refill() and Wash()  and the properties Color and Volume . A class called CupOfCoffee that derives from HotDrink  supports the ICup interface and has the additional property BeanType . A class called CupOfTea that derives from HotDrink  supports the ICup interface and has the additional property LeafType . Write some code for a function that will accept either of the two cup objects in the preceding example as a parameter. The function should call the AddMilk()  Drink()  and Wash() methods for any cup object it is passed. For this programi have written all the abstract classinterface and 2 derived classes..But i couldnt understand the final point. I have created one function in both derived classes. public void Method1( object o) { CupofCoffee c1 = ( CupofCoffee )o; c1.AddMilk(); c1.Drink(); c1.wash(); } The same like one in another derived class.But am stuck with this.I dont know how to create Mainmethod.Can anyone of u help to resove this program.Thanks 4 ur help.

Jan Montano · Answer

Did you create a console App? If not I suggest you create one instead. And add the interface and the 3 classes in your project. In your Program.cs generated by creating the console app you'll find your Main method. In my understanding it asks you to create one function with one parameter. You don't have to create that function inside the derived classes. I think you should create it in Program.cs instead. The trick here is that the type of parameter you should declare must accept both type CupOfCoffee and CupOfTea. Then you should have something like... static void Main(string[] args) { X coffee = new ...; X tea = new...; MyFunction(coffee); MyFunction(tea); } static void MyFunction(X parameter) { parameter.AddMilk(); parameter.Drink(); parameter.Wash(); } Goodluck! =)