#include<stdlib.h>
#include<stddef.h>
#include<stdio.h>

#include "rtbis.c" 

double func(double x) {
/* Define your function here */

	return sin(x) - 0.5*x; 

	}

void nrerror(char error_text[])
/* Numerical Recipes standard error handler */
{
        fprintf(stderr,"Numerical Recipes run-time error...\n");
        fprintf(stderr,"%s\n",error_text);
        fprintf(stderr,"...now exiting to system...\n");
        exit(1);
}


main() {

double root; 
double TOL = 0.00001; /* Desired Accuracy  */ 

	root = rtbis(func, 0.1, 3.0, TOL);

	printf("%s%g\n", "Root = ", root); 	
	
	}