hc: An Algebraic Calculator Copyright 2010-2025, Brian Johnson

This is my attempt to write something that bridges the gap between a simple calculator and a full-fledged computer algebra system. "bc" and "dc" are extant command-line calculators with various features, hence "hc". hc is written in Haskell, and one of its design goals is to demonstrate that Haskell is practical as a language for medium-size projects.

BUILD INSTRUCTIONS

1. Install ghcup
2. make

FEATURES

• Exact integer and rational number arithmetic
• Addition, subtraction, multiplication, division of integers and variables
• Raising to integer powers
• Various simplifications are performed
• expand() multiplies out products/powers of sums
• factor() can compute the square free factorization of a polynomial
• Assignment to variables with :=
• Input with command line editing, history, and tab completion