# define e .000001
float f(float x);
void main()
{
float x1,x2,x0,f0,f1;
clrscr();
scanf("%f%f",&x0,&x1);
f0=f(x0);
f1=f(x1);
if(f0*f1>0) printf("the guess values are wrong");
else {while((x1-x0)/x1 > e )
{	x2=(x1+x0)/2;
	if(f(x2)<0)
		x0=x2;
	else  x1=x2;
}
printf("\n%f is the value",x2);
}
getch();
}
float f(float x)
{
return x*x*x-x-4;
}