?? bessk0.c
字號(hào):
#include <math.h>float bessk0(float x){ float bessi0(float x); double y,ans; if (x <= 2.0) { y=x*x/4.0; ans=(-log(x/2.0)*bessi0(x))+(-0.57721566+y*(0.42278420 +y*(0.23069756+y*(0.3488590e-1+y*(0.262698e-2 +y*(0.10750e-3+y*0.74e-5)))))); } else { y=2.0/x; ans=(exp(-x)/sqrt(x))*(1.25331414+y*(-0.7832358e-1 +y*(0.2189568e-1+y*(-0.1062446e-1+y*(0.587872e-2 +y*(-0.251540e-2+y*0.53208e-3)))))); } return ans;}?? 快捷鍵說(shuō)明
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