?? xfred2.c
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/* Driver for routine fred2 */#include <stdio.h>#include <math.h>#define NRANSI#include "nr.h"#include "nrutil.h"#define N 8#define PI 3.1415927float g(float t){ return sqrt(t)-pow(PI/2.0,2.25)*pow(t,0.75)/2.25;}float ak(float t,float s){ return pow(t*s,0.75);}int main(void){ int i; float a=0.0,b=PI/2.0,*f; float *t,*w; t=vector(1,N); f=vector(1,N); w=vector(1,N); fred2(N,a,b,t,f,w,g,ak); /* Compare with exact solution */ printf("Abscissa, Calc soln, True soln\n"); for (i=1;i<=N;i++) printf("%10.6f %10.6f %10.6f\n",t[i],f[i],sqrt(t[i])); free_vector(w,1,N); free_vector(f,1,N); free_vector(t,1,N); return 0;}#undef NRANSI?? 快捷鍵說明
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