package logic;

/**
 * Created by Alexey on 07.05.2016.
 */
public class GSM {
    private double a, b, epsilon;

    public double getA() {
        return a;
    }

    public void setA(double a) {
        this.a = a;
    }

    public double getB() {
        return b;
    }

    public void setB(double b) {
        this.b = b;
    }

    public double getEpsilon() {
        return epsilon;
    }

    public void setEpsilon(double epsilon) {
        this.epsilon = epsilon;
    }

    private double f(double x){
        return 3.0*x - 2.;
    }

    public double algorithm(){
        double y = a + ((3. - Math.sqrt(5.))/(2.))*(b - a);
        double z = a + b - y;
        while (Math.abs(b - a) > epsilon){
            System.out.print(a + " a " + b + " b ");
            System.out.print(epsilon + " epsilon ");
            System.out.println(Math.abs(b-a) + " module");
            if (f(y) <= f(z)){
                b = z;
                y = a + b - y;
                z = y;
            } else {
                a = y;
                y = z;
                z = a + b - y;
            }
        }
        return ((a + b) / 2.);
    }
}

package logic;

/**
 * Created by Alexey on 07.05.2016.
 */
public class Main {
    public static void main(String[] args) {
        GSM gsm = new GSM();
        gsm.setA(1.004);
        gsm.setB(3.);
        gsm.setEpsilon(0.000000001);
        System.out.println(gsm.algorithm());
    }
}