void test(Slab const & s)
{
    // Create a copy of the object that s refers to
    //
    // Print the information about the copy. With objects constructed according to the
    // comments in main, the printout should be:
    // Concrete: Gray, 25x12x4, 2.8kg
    // Rock: Granite, Nature, 12x15x10, 10.5kg
    // Brick: Red, 25x10x10, 3.2kg
    // Concrete: Graphite, 20x20x6, 3.9kg, tumbled
    //
    // Destroy the copy
}

int main()
{
    // Create the following objects dynamically and store in some kind of container:
    // Type      Color    Size      Weight   type/tumbled
    // --------------------------------------------------
    // Concrete  Gray     25x12x4   2.8
    // Rock               12x15x10  10.5     Granite
    // Brick     Red      25x10x10  3.2
    // Concrete  Graphite 20x20x6   3.9      true

    // pass each object to test.

   return 0;
}