lab3ASA

#include <iostream>
#include <math.h>

using namespace std;

double f1(double x){
    double res = 1/pow(3*atan(x), 1.0/3);
    return res;
}

double f2(double x){
    double res = atan(x) - 1/ (3*pow(x,3));
    return res;
}

int main()
{
    setlocale(LC_ALL, "rus");
    cout << "1 метод" << endl;
    double x = 0.76;
    double eps = 1e-3;
    double prev_res = f1(x);
    double curr_res;
    while(abs(prev_res - f1(prev_res)) > eps ){
        cout<<prev_res<<endl;
        prev_res = f1(prev_res);
        curr_res = f1(prev_res);
    }
    cout<<curr_res<<' ';


    cout << "\n\n" << "2 метод" << endl;
    double a = 0, b = 1;
    double prev_x = (a + b) / 2;
    if((f2(a) * f2(prev_x)) < 0){
      b = prev_x;
    }
    else{
     a = prev_x;
    }
    double curr_x = (a + b) / 2;
    while(abs(prev_x - curr_x) > eps){
       prev_x = curr_x;
       if(f2(a) * f2(prev_x) < 0){
          b = prev_x;
       }
       else{
         a = prev_x;
       }
       curr_x = (a + b) / 2;

       cout<<prev_x<<' ';
       cout<<f2(a) * f2(prev_x) << ' ';
       cout << f2(b) * f2(prev_x) << endl;
    }
    cout<<curr_x<<' ';
    cout<<f2(a) * f2(curr_x) << ' ';
    cout << f2(b) * f2(curr_x) << endl;

    return 0;
}