?? midexp.c
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#include <math.h>#define FUNC(x) ((*funk)(-log(x))/(x))float midexp(float (*funk)(float), float aa, float bb, int n){ float x,tnm,sum,del,ddel,a,b; static float s; int it,j; b=exp(-aa); a=0.0; if (n == 1) { return (s=(b-a)*FUNC(0.5*(a+b))); } else { for(it=1,j=1;j<n-1;j++) it *= 3; tnm=it; del=(b-a)/(3.0*tnm); ddel=del+del; x=a+0.5*del; sum=0.0; for (j=1;j<=it;j++) { sum += FUNC(x); x += ddel; sum += FUNC(x); x += del; } s=(s+(b-a)*sum/tnm)/3.0; return s; }}#undef FUNC?? 快捷鍵說明
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