Kbase 20078: How to Call UNIX libm Function: Tan (Tangent)
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
7/1/2009 |
|
Status: Unverified
GOAL:
How to Call UNIX libm Function: Tan (Tangent)
FACT(s) (Environment):
Progress 9.x
UNIX
FIX:
The following sample code shows how to call the UNIX LIBM trigonometric function called Tan which resides in the UNIX shared library /usr/lib/libm.1, or /usr/lib/libm.so
/*This function returns the tangent of an angle in radians.*/
DEFINE VARIABLE decResult AS DECIMAL NO-UNDO.
PROCEDURE tan EXTERNAL "/usr/lib/libm.1" CDECL:
DEFINE INPUT PARAMETER dblValue AS DOUBLE NO-UNDO.
DEFINE RETURN PARAMETER dblResult AS DOUBLE NO-UNDO.
END PROCEDURE.
RUN tan (INPUT 0.655, OUTPUT decResult).
MESSAGE "The Tangent of 0.655 is " decResult
VIEW-AS ALERT-BOX.