an "overloaded subroutine" example

[James D Jarvis]

Here I used "overloading" to create primative math evaluator, set variables and run formulas or functions like a*x^2 + b*x + c the quadratic equation.

Evaluating strings to run my tinybasic in a sub routines to work as a scripting engine for a more complicated project is what led me to what I posted. But I needed a simple example with relatively clean code instead of the insane mess that I have in the main project to share with others.