/* Driver for routine bessik */#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 ri,rk,rip,rkp,x,xnu,xri,xrk,xrip,xrkp;	FILE *fp;	if ((fp = fopen("fncval.dat","r")) == NULL)		nrerror("Data file fncval.dat not found\n");	fgets(txt,MAXSTR,fp);	while (strncmp(txt,"Modified Bessel Functions",25)) {		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 %7s\n%14s %16s %17s %16s\n%14s %16s %17s %16s\n",		"xnu","x","ri","rk","rip","rkp","xri","xrk","xrip","xrkp");	for (i=1;i<=nval;i++) {		fscanf(fp,"%f %f %f %f %f %f",&xnu,&x,&ri,&rk,&rip,&rkp);		bessik(x,xnu,&xri,&xrk,&xrip,&xrkp);		printf("%5.2f %5.2f\n\t%16.6e %16.6e %16.6e %16.6e\n",xnu,x,ri,rk,rip,rkp);		printf("\t%16.6e %16.6e %16.6e %16.6e\n",xri,xrk,xrip,xrkp);	}	fclose(fp);	return 0;}#undef NRANSI