#include "stdafx.h"
#include <iostream>
#include <locale>
#include <math.h>

using namespace std;

int iterations;
int iterations2;

double function(double x) {
    return (x-1)*(x-1) - 3;
}

int derivative(double x) {
    return 2 * x - 2;
}


double function2(double x) {
    return cos(x)*cos(x)-pow(x, 1/5);
}

void dichotomy(double a, double b) {
    double x = (a + b) / 2;
    while (abs(function(x))>0.000001) {

        iterations ++;
        if (function(x) < 0) {
            b = x;
        }
        else  a = x;
        x = (a + b) / 2;
    }
    cout << "x0: "<< x << endl;
}



int СhordMethod(double a, double b) {
    double t;
    while (fabs(b - a) >= 0.000001) {
        iterations2++;
        t = a + (function(b)*(b - a)) / (function(b) - function(a));
        if (function(a)*function(t)<0) {
            b = t;
        }
        else if (function(t)*function(b)<0) {
            a = t;
        }
        else return t;
    }
    cout << "x0: " << t<<endl;
    return t;
}


int main()
{
    dichotomy(-2.0, 1.0);
    cout << "Number of iterations: " << iterations << endl;
    СhordMethod(-2.0, 1.0);
    cout << "Number of iterations: " << iterations2 << endl;
    system("pause");
    return 0;
}