package com.qwertovsky.helloworld.operation;
     
public class Adder
{
    private int sum;
        
    public Adder()
    {
        sum=0;
    }
        
    public Adder(int a)
    {
        this.sum=a;
    }

    public void add(int b)
    {
        sum+=b;
    }
        
    public int getSum()
    {
        return sum;
    }
}