For his 6th exercise, Prashant suggests writing a
Scientific calculator supporting addition, subtraction, multiplication, division, square-root, square, cube, sin, cos, tan, Factorial, inverse, modulus.
In planning my solution to this exercise, I thought it would be cool to write a DLL (a Class Library in .NET parlance) to be the core engine of the calculator, and then write a console-based front-end. Later, when I’m learning WPF I can write a graphical front-end to the same DLL.
