zad javaAA

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package zestaw;

import java.util.Scanner;

/**
 *
 * @author student
 */
public class Sumator {

    private int N;
    private double suma;

    public void sumuj() {
        suma = 0;
        for (int m = 1; m <= N; m++) {
            suma = suma + 1 / Math.pow(2, m);
        }
    }

    double wypisz() {
        return suma;
    }

    public Sumator(int N) {
        this.N = N;
        suma = Double.NaN;
    }

}