Function Oriented Calculator

This is a programmable scientific calculator. It enables you to define unlimited number of customized functions, use them in calculation and edit them later on. Like programming on computer, you can create functions with multiple parameters and you can call other functions in a function.

Here are some features:
-- Build in Trigonometric functions
-- Build in random function
-- Add notes for the function you created and they will be displayed together with the function. You will never forget what you had added.
-- Vibrate when the keys on main panel are pressed. Feel truer for pressing. (You can turn it off if don't like).
-- And of course, the basic computation ability.

Here are some notes and tricks for using:
-- In current version, you can't self-define constant, but I am working to implement it.
-- Note that the self recursion is not permitted.

Finally, thank you for choosing my Programmable Calculator, and hope you enjoy using it. ^-^