#include "stdafx.h"
#include <stdio.h>
#include <conio.h>
#include <math.h>
#include <iostream.h>
#define pi 3.14
 
int a; 
double f(double x) {
        return a*x-(((pi)/2)-atan(x));
}
int main() {
        int n=0;
        double b,c,d,eps;
		eps=0.0000001;
		b=0;
        cout<<"Given the equation: ax=arcctgx \n";
        cout<<"a="; cin>>a;
        cout<<"endpoint="; cin>>c;
        do {
                d=(b+c)/2;
                if (f(d)*f(b)<=0) c=d;
                else b=d;
 
                n+=1;
 
        }
        while (fabs(b-c)>=eps);
                cout<<"answer: "<<d<<"\n";
                cout<<"number of iterations: "<<n<<"\n";
                getch();
        return 0;
}