/* Driver for routine chebpc */#include <stdio.h>#include <math.h>#define NRANSI#include "nr.h"#define NVAL 40#define PIO2 1.5707963float func(float x){	return x*x*(x*x-2.0)*sin(x);}int main(void){	int i,j,mval;	float a=(-PIO2),b=PIO2,poly,x,y;	float c[NVAL],d[NVAL];	chebft(a,b,c,NVAL,func);	for (;;) {		printf("\nHow many terms in Chebyshev evaluation?\n");		printf("Enter n between 6 and %2d. (n=0 to end).\n",NVAL);		scanf("%d",&mval);		if ((mval <= 0) || (mval > NVAL)) break;		chebpc(c,d,mval);		/* Test polynomial */		printf("\n%9s %14s %14s\n","x","actual","polynomial");		for (i = -8;i<=8;i++) {			x=i*PIO2/10.0;			y=(x-0.5*(b+a))/(0.5*(b-a));			poly=d[mval-1];			for (j=mval-2;j>=0;j--) poly=poly*y+d[j];			printf("%12.6f %12.6f %12.6f\n",x,func(x),poly);		}	}	return 0;}#undef NRANSI