Problem 1 - CS 630 - Computing Fundementals I

CS 630 - Computing Fundementals I - Summer 2004 Problem 1 - More Practice with Classes

Loyola College > Department of Computer Science > CS 630 > Homework > Homework 6 > Problem 1

Objectives

to write methods that use conditional statements
to use named constants
to write test drivers

Introduction

Recall that the LibraryBook class from a previous example had fields for title, author, borrower, and due date. This class has been updated to include two more fields: call number (a string), and replacement cost (a double). The constructors have been updated to work with these new fields. We will also add several methods that use these fields and the original fields.

Assignment

Add the following methods to the LibraryBook class.

printWarning, which should allow the programmer to pass an int parameter and should use cout to print a message like "TITLE -- checked out to BORROWER due on DATE" (replacing TITLE, etc. with the values from the fields) if the number of days until the book is due is less than the parameter but should do nothing otherwise. See the code for toString for an exaple of how to print dates nicely. For example, if we add the following statements to the main method in BookTest.cpp
```
LibraryBook b1 = LibraryBook("The Iliad", "Homer", "F 121.11H");
LibraryBook b2 = LibraryBook("The Odyssey", "Homer", "F 121.12H");
b1.checkout("Karen Glenn", MyDate(JUL, 7, 2004));
b2.checkout("Karen Glenn", MyDate(JAN, 5, 2005));
b1.printWarning(5);
b2.printWarning(5);
```
we should get the following output
```
The Iliad checked out by Karen Glenn due on 10/18/2003 12:00 AM
```
Since the first book is due within five days and the second one is not.
isReference, which returns true is the book is a reference book and false otherwise. Reference books are distinguished from other books by the first letter of the call number, which is 'R' for reference books. You can use the at string method to get the first character of the call number and can then compare that to the named constant REFERENCE_PREFIX (which is defined to be 'R') using the normal comparison operators.
renew, which advances the due date by 7 days for reference books and 21 days for all other books. Use the named constants declared in LibraryBook instead of 7 and 21. (Note that this method is separate from the one that allows one to specify the number of days to renew the book).
calcOverdueFine, which returns the overdue fine for the book. For books that are not due the fine should be 0. For reference books the fine is 1 dollar per day. The fine for other books is 25 cents per day. No fine should exceed the replacement cost of the book, which is stored in the replacementCost field, except when the replacement cost is 0, in which case there is no limit on the fine. You can calculate the fine by
- multiplying the number of days until the book is due by 1.00 or 0.25 and saving the result in a variable;
- if the result is larger than the replacement cost, setting the variable to the replacement cost; and
- if the book is not overdue, setting the variable to zero; and finally
- returning the value stored in your variable.
Use named constants and call methods already defined where appropriate.

Finish the test driver started in BookTest.cpp. Your test driver should test all the cases of the methods described above. For example, to test isReference you would display the result of calling isReference on a reference book and a non-reference book. Part of your grade for this homework will depend on how completely you test your class.

Objectives

Introduction

Assignment

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