Haskell-Prefix-Calculator

This Haskell project implements a simple prefix notation calculator. The calculator supports basic arithmetic operations and maintains a history of results that can be referenced in subsequent calculations.

Features

Basic Arithmetic Operations: Addition, Subtraction, Multiplication, and Division.

History Reference: Ability to reference previous results using a history index. -- the entire history will print after each expression. In case you forget what you typed.

Interactive Loop: Continuously prompts the user for expressions until the user types "quit".

Files

prefixCalculator.hs: Main source code for the prefix calculator.

Running the Calculator

To run the prefix calculator follow these steps:

• save the .hs file into a directory of your choosing.

• open a terminal window and navigate to the directory where the file was saved.

• type in the following command to compile the .hs file:

    ghc -o prefixCalc prefixCalculator.hs
  

• after compiling type in the following command to run the program

    ./prefixCalc
  

• when running the program, you MUST put spaces between every operator and value

      e.g: Enter an expression: + + 3 2 1
      Enter an expression: * * $3 $2 $1  
      Enter an expression: / / 3 2 1
  

• when you are done using the calculator type in the following command:

      quit