lisp-poly-calculator

LISP Polynomial Calculator

• A simple polynomial calculator in Common Lisp

• Polynomials are in the form:

  '(((SYMBOL EXPONENT) MULTIPLIER) ((SYMBOL EXPONENT) MULTIPLIER))
  

• For example this:

  '(((x 2) 5) ((((x y) (2 3)) 5))) = 5x^2 + 5x^2y^3
  

• The functions that exist are poly+ poly- poly*, all three take two inputs, polynomials in the form described above, and output polynomials in the same format. They perform the respective operations addition, subtraction and multiplication.

Below you can see an example of the test output:

[25]> (load "tests.cl")
;; Loading file tests.cl ...
;;  Loading file poly.cl ...
;;  Loaded file poly.cl
;; Loaded file tests.cl
T
[26]> (run-tests)
5x^2 + 3x^2 ... passed - simple addition
5x^2+6y^2 + 3x^2+3y^2+4z^3 ... passed - complex addition
5x^2 - 3x^2 ... passed - simple subtraction
5x^2+6y^2 - 3x^2+3y^2+4z^3 ... passed - complex subtraction
5x^2 * 5x^2 ... passed - simple multiplication
(5x^2+y^2) * (3x + y) ... passed - complex multiplication
T
[27]>