C Cli Calculator inspired by @Ashefromapex
...but what is expr??
TODO
- basic operations with precedence
- parentheses
- exponents
- unary minus
- omit multiplication symbol
- absolute value
- square root _sqrt and any root _rt_{num}
- trigonometric operations sin / cos / tan
- ln _ln and any logarithm _log_{num}
- constants pi & e
- variable decimal point precision
- simple mode
- function mode
- statistics mode
- add variable support
- add plots