Bonus Marks

• › Change the prompt from lispy> to something of your choice.
• › Change what is echoed back to the user.
• › Add an extra message to the Version and Exit Information.
• › What does the \n mean in those strings?
• › What other patterns can be used with printf?
• › What happens when you pass printf a variable that does not match the pattern?
• › What does the preprocessor command #ifndef do?
• › What does the preprocessor command #define do?
• › If _WIN32 is defined on windows, what is defined for Linux or Mac?