buildwall

answer = "not yes"
i = 1

print("If you wish to build a wall and not a 4 sided room enter the width as wall. The smallest room this program can make is 3 x 3.")

while answer ~= "yes" do
  answer = "not yes"
  write("Enter the height: ")
  h = read()
  write("Enter the length: ")
  l = read()
  write("Enter the width: ")
  w = read()
  print("You entered your height as ", h," your length as ", l," and your width as ", w,".")
  print("Is this correct?")
  if w ~= "wall" then
    while (answer ~= "yes") and (answer ~= "no") do
      answer = read()
      if answer == "yes" then
        print("This room will cost about ", l*h*2+w*h*2-4*h," blocks.")
      elseif answer == "no" then
        print("Please try again.")
      else
        print("I don't understand ", answer,". Please enter yes or no.")
      end
    end
  else
    while (answer ~= "yes") and (answer ~= "no") do
      answer = read()
      if answer == "yes" then
        print("Wall will cost about ", h*l," blocks.")
      elseif answer == "no" then
        print("Please try again.")
      else
        print("I don't understand ", answer,". Please enter yes or no")
      end
    end
  end
end

local function adjust()
  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()
end

local function reset()
  turtle.turnRight()
  turtle.back()
  turtle.back()
end

local function checkSlot()
  while turtle.getItemCount() == 0 do
    turtle.select(i)
    i = i + 1
    if i > 16 then
      i = 1
    end
  end
  return true
end

local function makeSide()
  for j = 1, h, 1 do
    if checkSlot() then
      turtle.place()
      turtle.up()
    end
  end
  adjust()
  h = 0
  while turtle.down() do
    h = h + 1
  end
end

for n = 1, l, 1 do
  makeSide()
end
if w == "wall" then
  print("Completed Wall")
else
  reset()
  for n = 1, w-1, 1 do
    makeSide()
  end
  reset()
  for n = 1, l-1, 1 do
    makeSide()
  end
  reset()
  for n = 1, w-2, 1 do
    makeSide()
  end
  print("Completed Room")
end