#!/usr/bin/ruby -w

class ThreeDArray
  def initialize(maxx, maxy)
    @maxx, @maxy = maxx, maxy
    @content = []        # this is where I'll keep the actual content
  end

  def index(x, y, z)
    ((x * @maxx) + y) * @maxy + z
  end

  def [](x, y, z)
    @content[index(x, y, z)]
  end

  def []=(x, y, z, newVal)
    @content[index(x, y, z)] = newVal
  end
end

a = ThreeDArray.new(3, 3)

for i in 0..2
  for j in 0..2
    for k in 0..2
      a[i, j, k] = i * j * k
    end
  end
end

for i in 0..2
  for j in 0..2
    for k in 0..2
      printf "%4d", a[i, j, k]
    end
    puts
  end
  puts
end