#include "CubeClass.h"                      // Computer, I told you what a Cube is in CubeClass.h

Cube::Cube(double h, double w, double d) { // I mentioned that I wanted a constructor. Here is how it works.
    height = h;                               // When a Cube is instantiated, it needs a h, w, d.
    width = w;                                // As soon as a Cube is created, set it's private height, width, depth
    depth = d;                                // variables to whatever h, w, and d are.
}

double Cube::volume() const {              // I mentioned that a Cube can be asked what it's own volume is.
    return height * width * depth;
}