Exercise: Program Arguments

Pull the latest version from Git. For this exercise we have prepared:

• ProgramArguments.scala: contains function stubs functions parseArgument, setLanguage, setInputFile, and setNumPages which need to be implemented.
• ProgramArgumentsTest.scala: contains unit tests. Before using these unit tests, you have to activate them by replacing all occurrences of ignore with in.

Your task is to implement functions parseArgument, setLanguage, setInputFile, and setNumPages by using pattern matching, when appropriate. Function parseArgument should call the other helper functions, depending on its arguments.