This time we want to calculate overdraft fees for the media.1 2

Step 1

First we will extend our Medium class with a few new members: - a int property with the name “Period” - a float property with the name “FeePerDay” - a DateTime property with the name “ReturnDate” (the predicted date the book should be returned) - they all have a get and a protected set - a public method “CalculateFee” that will calculate the fee that is need to pay

We extend our UserAccount with one member too: - a float property with the name “FeeToPay” - it has a get and a protected set

Hint: DateTime can be found in the namespace System.

Step 2

Update your constrcutor and all constructor for your children classes.

Also familiarize yourself with the DateTime3 class. We will need some things from it (e.g. in the constructor).

Step 3

Now we write the implementation for the “CalculateFee” method.

It should allways return 0.0 if the actual date (the actual return date) is befor the predicted “ReturnDate”. Calculate the fee also for a started day.

Hint: To measure the difference between to dates the Tick property of DateTime is really nice.

Step 4

And again, create documentation comments on all created stuff.

  1. You can find the tests for this task Here ↩

  2. You can find the solution to this task Here. ↩

  3. MSDN site for DateTime ↩