Shape.js

Shape.js

function Shape(){

    let shape = [];
    //shape.totalVolume = totalVolume;
  
    /* Added the function add the shape in the 'shape' array. */
    shape.addShape = function (newShape) {
        shape.push(newShape);
    }

     
    //console.log(shape2.computeConeVol(5,10));
    shape.volume = function () {
        /* Instead of declaring a array, declaring a variable with initial value 0 */
        let totalVolume = 0.0;
        shape.forEach(item => {
            /* Adding the volumes of shapes into the totalVolume variable. */
            totalVolume = totalVolume + item.computeVolume();
        });

        return totalVolume;
    }
    return shape;
}
let Sphere = require ('./sphere');
let shape1 = new Sphere(8);

let Cone = require ('./cone');     
let shape2 = new Cone(5,10);  

/* Created the shape object and added objects to it */
let shapes = Shape();
shapes.addShape(shape1);
shapes.addShape(shape2);

/* Calling the volume function of the Shape class. */
console.log(shapes.volume());