mathematics funtion library
The math function library contains a comprehensive set of mathematics functions, including:
logarithmic ( base e and base 10 )
exponential ( base e and base 10 )
miscellaneous ( square root, power, etc. )
The names of library functions usually begin with a three character prefix that identifies the library - in this case it would be Xma .
In math intensive programs, this is visually annoying and unnatural. For this reason, the math and complex number libraries violate the naming convention in favor of familiar names. To take the sine of angle a# , therefore, write:
x# = SIN(a#) ' correct
x# = XmaSin(a#) ' wrong
arguments and return values
Except for POWER() , all math library functions take one DOUBLE argument and return a DOUBLE result. POWER() takes two DOUBLE arguments and returns a DOUBLE result.
Angles are always radians, for both arguments and return values.
To convert degrees to radians, multiply by $$DEGTORAD.
To convert radians to degrees, multiply by $$RADTODEG.
Your program must contain EXTERNAL FUNCTION statements in the PROLOG for every math library function it calls. You can include all the function declarations and constant definition of the math library with an IMPORT "xma" in your prolog as in:
IMPORT "xma" ' include math library declarations
IMPORT "xst" ' include standard library declarations