DecrementBinaryCounter.java

package amortizedAnalysis.binarycounter;

import java.util.Arrays;

public class DecrementBinaryCounter {
    public static void main(String[] args){
        int[] binary = {1, 0, 0, 1}; // initialize the binary array to 1001
        System.out.println(Arrays.toString(binary)); // prints [1, 0, 0, 1]
        decrement(binary); // decrements the binary array
        System.out.println(Arrays.toString(binary)); // prints [1, 0, 0, 0]
        decrement(binary);
        System.out.println(Arrays.toString(binary)); // prints [0, 1, 1, 1]
        decrement(binary);
        System.out.println(Arrays.toString(binary)); // prints [0, 1, 1, 0]
        decrement(binary);
        System.out.println(Arrays.toString(binary)); // prints [0, 1, 0, 1]
    }

    public static void decrement(int[] a){
        int k = a.length;
        for(int i = k-1; i >= 0 ; i--){
            if(a[i] == 0){
                a[i] = 1;
            }else{
                a[i] = 0;
                return;
            }
        }
    }
}