Table of contents

• Introduction
• Available operations and commands
• Building and running
  • OCaml

A few weeks ago, I stumbled upon a web page that was called something like "RPN calc in many languages". I can't find the link right now. I decided to practice with the OCaml language.

Although OCaml has a Stack module in the standard library, I decided to implement everything by myself, using a simple List as the stack.

As shown in the source code, there are a few operations and a couple of commands:

$ ocaml rpn_calc.ml
1 2 3 + +
6.
q
$

or

$ echo '1 2 3 + +' | ocaml rpn_calc.ml
6.
$

First, comment out or delete the first line in the source that reads #load str.cma. Then, using ocamlbuild :

$ cd rpn_calc
$ ocamlbuild -use-ocamlfind rpn_calc.native
$ ./rpn_calc.native
1 2 3 + +
6.
1 2 p 3 p + p + q
1. 2.
1. 2. 3.
1. 5.
6.
$