Reverse-Polish Notation calculator implementation
This implementation currently consists of two classes, Calculator which
performs the actual calculations by
- accepting space-separated string input which is broken into parts
- a match on one of integer, float or operator is attempted
- if integer or float is matched, the value is pushed onto the stack
- if operator is matched, the operation is run on the stack and the output returned
and CLI which provides the command-line interface.
The calculation is separated from the IO interface in order that any interface
can easily interact with the calculator by simply passing input to handle_input.
A known issue is the calculator's handling of integer values and division,
for example, > 10 90 / will return 0, whereas > 10.0 90 / will return 0.1111111111111111.
This could be solved by casting all inputs as float values or specifically handing division differently.
To Run
From the command-line run:
./bin/calculator
Example Usage
Input can be given on separate lines
> 900
> 5
> /
180
> 45.59
> 59
> *
2689.8100000000004
Or on the same line
> 23 90 +
113
> 34 99 - 44 4 -
-65
40