Math Functions in RPG

Q. Is it possible to perform higher math functions in RPG, such as exponentials, cos(x), sin(x), and so on?

A. Exponentiation is available directly using the ** operator (e.g., x=y**z). All other higher math functions (including exponentiation) are available in RPG by calling C functions in directory QC2LE. You can view sample RPG code that calls the Cosine function in the Redbook "Who Knew You Could Do That with RPG IV? A Sorcerer's Guide to System Access and More," which is viewable and downloadable at http://www.redbooks.ibm.com/redpieces/abstracts/sg245402.html.

Here is a list of math functions in QC2LE:

acos  - Arc cosine function.
asin  - Arc sine function.
atan  - Arc tangent function.
atan2 - Arc tangent function.
ceil  - Round to smallest integral value greater than or equal to.
cos   - Cosine function.
cosh  - Hyperbolc cosine function.
exp   - Exponentiation function.
fabs  - Floating point absolute value function.
floor - Round to largest integral value not greater than.
fmod  - Floating point remainder function.
frexp - Convert floating point number to fractional and integral components.
ldexp - Multiply a floating point number by an integral power of two.
log   - Natural logarithm function.
log10 - Base 10 logarithm function.
modf  - Extract signed integral and fractional parts from a floating point number.
pow   - Compute the first argument to the power of the second.
sin   - Sine function.
sinh  - Hyperbolic sine function.
sqrt  - Square root function.
tan   - Tangent function.
tanh  - Hyperbolic tangent function.

You can learn more about the math functions in IBM's "C Library Reference" manual at http://as400bks.rochester.ibm.com/cgi-bin/bookmgr/BOOKS/QBJATN00/CCONTENTS.

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