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View Full Version : Expression Manipulator v0.4 (bugs fixed, derivatives work with trig funcs)



ygfperson
06-07-2003, 10:37 PM
Current functions built-in:
sin
cos
tan
cot (cotangent)
sec (secant)
csc (cosecant)
ln() (log of base 2.71...)
log (log of base 10)
sqrt (square root)
f() is defined at run-time as f(x) = x + y

Later on I'll post an executable. But for now here are the features:
Extra factors and terms, even factors with powers of zero, are eliminated upon request, without problems anymore
derive() allows you to take the derivative of anything (except factors with variables in the exponent. that's still a work in progress)
when derived, trig functions work correctly. (ie: derive(sin(x)) == cos(x) * dx)
ln(x) and log(x) work, too. log assumes base 10.
simplifying is done in one function now.


Things to come:

Factorization of single factors, then more complicated stuff like polynomials
Integration through implementation of integration rules
limits
deriving variable exponents
solving for a variable
better standards compliance so it'll compile in changes in more compilers
fractions and whole numbers
A more natural grammar to work with through overloading operators
implement text syntax for defining functions in run-time
better private/public seperation


Please tell me what you think of it!

ygfperson
06-08-2003, 08:10 AM
Here's the executable. (Run at command-prompt)