/* Driver for routine frenel */#include <stdio.h>#include <stdlib.h>#include <string.h>#define NRANSI#include "nr.h"#include "nrutil.h"#define MAXSTR 80int main(void){	char txt[MAXSTR];	int i,nval;	float c,s,x,xc,xs;	FILE *fp;	if ((fp = fopen("fncval.dat","r")) == NULL)		nrerror("Data file fncval.dat not found\n");	fgets(txt,MAXSTR,fp);	while (strncmp(txt,"Fresnel Integrals",17)) {		fgets(txt,MAXSTR,fp);		if (feof(fp)) nrerror("Data not found in fncval.dat\n");	}	fscanf(fp,"%d %*s",&nval);	printf("\n%s\n",txt);	printf("%5s %12s %14s %16s %14s \n",		"x","actual","c(x)","actual","s(x)");	for (i=1;i<=nval;i++) {		fscanf(fp,"%f %f %f",&x,&xs,&xc);		frenel(x,&s,&c);		printf("%6.2f %15.6e %15.6e %15.6e %15.6e\n",			x,xs,s,xc,c);	}	fclose(fp);	return 0;}#undef NRANSI