Bonus Marks

• › Run the previous chapter’s code through gdb and crash it. See what happens.
• › How do you give an enum a name?
• › What are union data types and how do they work?
• › What are the advantages over using a union instead of struct?
• › Can you use a union in the definition of lval?
• › Extend parsing and evaluation to support the remainder operator %.
• › Extend parsing and evaluation to support decimal types using a double field.