/*
* Implement the "I only know how to add and subtract 1"
* example using recursion.
* 
* @author gtowell
* Created: Aug 11, 2021
*/
public class AddOne {
    public int adder(int base, int adder) {
        if (adder == 1)
            return base + adder;
        if (adder == 0)
            return base;
        if (adder < 0)
            return -999;
        return adder(base, adder - 1) + 1;
    }

    /**
     * Alternate implementation of add one. 
     * @param num1 one of the numbers
     * @param num2 the other number
     * @return
     */
    public int rAdder(int num1, int num2) {
        if (num2<=0) 
            return num1;
        return rAdder(num1+1, num2-1);
    }
        
    public static void main(String[] args) {
        AddOne addr = new AddOne();
        System.out.println("5+1=" + addr.adder(5, 1));
        System.out.println("5+3=" + addr.adder(5, 3));
        System.out.println("5+5=" + addr.adder(5, 5));
    }
}