Overloading class members and operators

Question

Hi ALL I was given 2 questions. But have little clue what to do. Please anyone help me. 1) Write a class with an overloaded method used to add numbers.One method should have 2 integer parameters and the other should take the numbers as a parameter. Use both methods in an example and write the results to the console. 2) Write a class Item used to store an item's name and its price. Now write a class PriceList which stores an array of 5 items. Overload the multiplication(*) operator in this class to multiply every item in the price list by the provided amount.

Alan · Answer

Hi Darren The first question doesn't even make sense - I suspect it should read: 1) Write a class with an overloaded method used to add numbers.One method should have 2 integer parameters and the other should take three numbers as parameters . Use both methods in an example and write the results to the console. Overloaded methods are methods with the same name but which have different numbers of parameters and/or the parameters are of different types. So if I tell you that the overloaded methods here are: public double Add (double x double y) { // code } public double Add (double x double y double z) { // code } then hopefully you'll be able to finish this question yourself. The second question doesn't make sense either but I think it means: 2) Write a class Item used to store an item's name and its price. Now write a class PriceList which stores an array of 5 items. Overload the multiplication(*) operator in this class to multiply the price of every item in the price list by the provided amount. Overloading an operator in a class means giving one of the standard C# operators a meaning in relation to objects of that class. Here I think they're expecting you to define the multiplication operator in the PriceList class like this; class PriceList { Item[] items; public Item[] Items { get{ return items;} } public PriceList(Item[] items) { this.items = items; } public static PriceList operator * (PriceList pl double amount) { for(int i= 0; i { Item item = pl.Items[i]; item.Price *= amount; } return pl; } public static PriceList operator * (double amount PriceList pl) { return pl * amount; } } As multiplication is normally 'commutative' (the result is the same whichever way around the operands are) you'll notice that I've added an overload of the * operator to deal with this which is defined in terms of the other one. Over to you now to finish it off.