RPN(Reverse Polish Notation) Calc

Reverse Polish Notation (RPN) Calc.

Installation

cargo add rpn_lib

Example

``` use rpn_lib::eval;

fn main() { let src = String::from("1 2 + 3 * "); let a = eval(src).unwrap(); println!("{}", a); // →9 } ```

Example2

let src = String::from("1 2 + 3 * "); let a = rpn_lib::eval(src).unwrap(); println!("{}", a); // →9