// Encapsulation of binary numbers

import java.util.Scanner;

class BinaryNumber {

    // Store the binary number as an array of boolean
    static final int NBITS = 8;
    private boolean [] bits = new boolean [NBITS];

    /** Constructor initializes with low bits at end of array */
    public BinaryNumber(String s) {
        // Fill this in
    }

    /** Convert to decimal integer value */
    public int intValue() {
        // Fill this in
    }

    /** Determine if two BinaryNumbers are equivalent */
    public boolean equals(BinaryNumber b2) {
        // Fill this in
    }

    /** Produce String representation of BinaryNumber */
    public String toString() {
        // Fill this in
    }

    /** Add one BinaryNumber to another */
        // Define this method and code it
                

    // Main method to test BinaryNumber
    public static void main(String[] args) {
        // Prompt for numbers if not on command line
        String number1, number2;
        if (args.length < 1) {
            Scanner input = new Scanner(System.in);
            System.out.print("Enter two eight bit binary numbers: ");
            number1 = input.next();
            number2 = input.next();
        } else {
            number1 = args[0];
            number2 = args[1];
        }

        BinaryNumber b1 = new BinaryNumber(number1);
        BinaryNumber b2 = new BinaryNumber(number2);
        BinaryNumber b3;

        System.out.println("b1 is " + b1 + " (" + b1.intValue() + ")");
        System.out.println("b2 is " + b2 + " (" + b2.intValue() + ")");
        System.out.println("b1.equals(b2) is " + b1.equals(b2));
        b3 = b1.add(b2);
        System.out.println("b3=b1.add(b2) is " + b3 + " (" + b3.intValue() + ")");
        b3 = b3.add(b1);
        System.out.println("b3=b3.add(b1) is " + b3 + " (" + b3.intValue() + ")");
        b2 = b2.add(b1).add(b1);
        System.out.println("b2=b2.add(b1).add(b1) is " + b3 + " (" + b2.intValue() + ")");
        System.out.println("b2.equals(b3) is " + b2.equals(b3));
    }
}