Interactive Calculator (Calculator REPL)
This is an interactive calculator.
How To use
To build and execute, run
stack build stack exec calculator
To test, run
Description of Program
We define an equation recursively to be either (1) a single value, or (2) two nodes and an operator, where a node can be either a value or another equation. Then we take input line-by-line from the interactive session and apply a lexical parser to it. The lexical analysis returns an equation, which is then evaluated by eval.
At the moment it only really handles integers (so don't try dividing by a float).
- Extend functionality to include floating point numbers
Make lexical analyser handle differing levels of whitespace