#include <math.h>float bessy1(float x){	float bessj1(float x);	float z;	double xx,y,ans,ans1,ans2;	if (x < 8.0) {		y=x*x;		ans1=x*(-0.4900604943e13+y*(0.1275274390e13			+y*(-0.5153438139e11+y*(0.7349264551e9			+y*(-0.4237922726e7+y*0.8511937935e4)))));		ans2=0.2499580570e14+y*(0.4244419664e12			+y*(0.3733650367e10+y*(0.2245904002e8			+y*(0.1020426050e6+y*(0.3549632885e3+y)))));		ans=(ans1/ans2)+0.636619772*(bessj1(x)*log(x)-1.0/x);	} else {		z=8.0/x;		y=z*z;		xx=x-2.356194491;		ans1=1.0+y*(0.183105e-2+y*(-0.3516396496e-4			+y*(0.2457520174e-5+y*(-0.240337019e-6))));		ans2=0.04687499995+y*(-0.2002690873e-3			+y*(0.8449199096e-5+y*(-0.88228987e-6			+y*0.105787412e-6)));		ans=sqrt(0.636619772/x)*(sin(xx)*ans1+z*cos(xx)*ans2);	}	return ans;}