Inlab 5: Decisions

Due: Friday 19 February at 6 pm

Purpose

The purpose of this in-lab is to introduce you to the concept of making decisions in Java using the if statement.

Partners

This is an individual assignment, though collaboration (not solution sharing) is allowed.

Preliminaries

Create a BlueJ project named Inlab5 on your lab computer. Place the following files into this project:

• TestProgram.java
• BahnCard.java

Assignment

Train travelers in Germany can buy a one year discount card for the train system called a BahnCard. There are three types of BahnCards: a BahnCard 25 (provides the rider with a 25% discount), a BahnCard 50 (provides the rider with a 50% discount), and a BahnCard 100 (provides the rider with a 100% discount). In Germany, one can travel first class or second class on the train system.

In this assignment, you are going to calculate how much a BahnCard costs to buy, using the following rules.

• BahnCard25. The card costs 110 euros for a first class card and 55 euros for a second class card. However, if the rider is younger than 19, a second class card can be purchased for 10 euros.
• BahnCard50. The card costs 440 euros for a first class card and 220 euros for a second class card. However, both of these cards can be purchased at half price (220 for first class, 110 for second class) if any one of the following three conditions applies:
  • The person is seventeen years old or younger.
  • The person is sixty years old or older.
  • The person is a student who is younger than 27.
• BahnCard100. The card costs 5900 euros for a first class card and 3500 euros for a second class card.

Note: do not modify the TestProgram.java file.

Submission

By Friday evening at 6:00 pm, submit the BahnCard.java file into the appropriate D2L dropbox folder. DO NOT SUBMIT .class files. Partial credit can be earned, but late assignments will not be accepted.

Grading - 10 points possible

• 8 points. You will lose 1 point for each of the 40 test cases that does not produce the correct answer up to a maximum of 8 points. Output should look like this (output.txt).
• 1 point. Place an appropriate Javadoc comment at the top of the BahnCard.java file. Use the code that was demonstrated in lecture on Friday, February 12 as a model.
• 1 point. Place appropriate Javadoc comments preceding each of the five methods in the BahnCard.java file. Use the code that was demonstrated in lecture on Friday, February 12 as a model.

Helpful Hint

There are three methods in the BahnCard class that you must modify: bahnCard25Price, bahnCard50Price and bahnCard100Price. Do the easiest method first, the second easiest method second and the most difficult method last.