Compiler Construction – SMD163

Homework assignment 1

1. Compile and run the quick calculator program (QuickCalc.java). You can also rewrite it
   in a language of your own choice if you wish …
   
   
2. Extend the data structures with a representation for unary minus
   
   
3. Add methods to construct and evaluate the new forms of expression (you can ignore the
   compile method; just use {} for the body)
   
   
4. Modify the parser, giving unary minus a higher precedence than any other operator (for
   example, -2+3, -(2+3), 4 * -5, and - - 23 should give 1, -5, -20, and 23, respectively)