#include <stdlib.h>
#include <stdio.h>
#include <math.h>
// need to add lib 'm' first, and then 'bessel'.Because libbessel need libm
double j0( double x );
double y1( double x );
double jn( int n, double x );
int main( void )
{
double x, y, z;
x = j0( 2.4 );
y = y1( 1.58 );
z = jn( 3, 2.4 );
printf( "j0(2.4) = %f, y1(1.58) = %f\n", x, y );
printf( "jn(3,2.4) = %f\n", z );
return EXIT_SUCCESS;
}