package com.company;

/*
   Create a Calculator class with members: a and b using the appropriate data type
    The Calculator class must implement an interface called Calculable with the following method signatures
    double add(double num1, double num2);
    double subtract(double num1, double num2);
    double multiply(double num1, double num2);
    double divide(double num1, double num2);
    Create parameterized constructor which initializes the instance variables
    Modify the Calculator so that any of the methods can accept an array as a parameter
 */

public class Calculator implements Calculable {

    private double a, b;
    private double[] numbers;

    public Calculator(double a, double b) {
        this.a = a;
        this.b = b;
    }

    public Calculator(double[] numbers) {
        this.numbers = numbers;
    }

    public double add() {
        return a + b;
    }

    public double addNumbers() {
        double sum = 0;

        for(int i = 0; i < numbers.length; i++) {
            sum = sum + numbers[i];
        }

        return sum;
    }

    public double subtract() {
        return a - b;
    }

    public double multiply() {
        return a * b;
    }

    public double divide() {
        return a / b;
    }

    public void someMethod(Calculable c) {

    }

    public static void main(String[] args) {

        double num1 = 5.0, num2 = 10.0;

        Calculator c = new Calculator(num1, num2);

        System.out.printf("Adding: %f and %f = %f", num1, num2, c.add());
        System.out.printf("Subtracting: %f and %f = %f", num1, num2, c.subtract());
        System.out.printf("Multiplying: %f and %f = %f", num1, num2, c.multiply());
        System.out.printf("Dividing: %f and %f = %f", num1, num2, c.divide());
    }
}

interface Calculable {
    double add();
    double subtract();
    double multiply();
    double divide();
}