32 lines
652 B
C
32 lines
652 B
C
|
|
#include <math.h>
|
|
#define EPS 1.0e-6
|
|
#define JMAX 14
|
|
#define JMAXP (JMAX+1)
|
|
#define K 5
|
|
|
|
float qromo(float (*func)(float), float a, float b,
|
|
float (*choose)(float(*)(float), float, float, int))
|
|
{
|
|
void polint(float xa[], float ya[], int n, float x, float *y, float *dy);
|
|
void nrerror(char error_text[]);
|
|
int j;
|
|
float ss,dss,h[JMAXP+1],s[JMAXP];
|
|
|
|
h[1]=1.0;
|
|
for (j=1;j<=JMAX;j++) {
|
|
s[j]=(*choose)(func,a,b,j);
|
|
if (j >= K) {
|
|
polint(&h[j-K],&s[j-K],K,0.0,&ss,&dss);
|
|
if (fabs(dss) <= EPS*fabs(ss)) return ss;
|
|
}
|
|
h[j+1]=h[j]/9.0;
|
|
}
|
|
nrerror("Too many steps in routing qromo");
|
|
return 0.0;
|
|
}
|
|
#undef EPS
|
|
#undef JMAX
|
|
#undef JMAXP
|
|
#undef K
|