Playing with code: a circle function using triangle math

[CharlieJV]

I made substantial changes to that CIRCLE testing program I shared yesterday.  Substantial enough that I had to do a little write-up.

The program now also has two additional circle subroutines for performance comparison: Bresenham's circle algorithm and the midpoint circle algorithm.

Would you believe that my tiny "triangle-math-based" algorithms beats the other two by a hair?

Details in CIRCLE Algorithms Testing Enhanced