cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ] #include <mathcw.h> extern float j0f (float x); extern double j0 (double x); extern long double j0l (long double x); extern __float80 j0w (__float80 x); extern __float128 j0q (__float128 x); extern long_long_double j0ll (long_long_double x); extern decimal_float j0df (decimal_float x); extern decimal_double j0d (decimal_double x); extern decimal_long_double j0dl (decimal_long_double x); extern decimal_long_long_double j0dll (decimal_long_long_double x);
NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.
This function is not required by ISO Standard C (1989 or 1999), but it is part of IEEE Std 1003.1-2001, informally known as POSIX 2001. Implementations of this function are also available in most Unix C math libraries (-lm).
The ordinary Bessel functions provided by these software implementations are defined according to Chapter 9, Bessel Functions of Integer Order, of the Handbook of Mathematical Functions, edited by Milton Abramowitz and Irene A. Stegun, National Bureau of Standards Applied Mathematics Series #55, US Department of Commerce, Washington, DC (1964).