Stair Builder

Hello!

So I created a program that simply makes a stair case. I really wanted to practice what I know of Lua, so that's what it is overly complex. It is version 1.0, so I know that it can be improved. For one it crashes when strings are inputed instead of numbers. But this is a known issue. :)/>/> Any ideas for other uses would be nice too. :D/>/>

local finished = false
local function stairPlaceUp()
turtle.up()
turtle.placeDown()
turtle.forward()
end
local function stairPlaceDown()
turtle.placeDown()
turtle.forward()
turtle.down()
end
local function refuel()
if turtle.getFuelLevel() < 1 then
  for i = 1,16 do
   turtle.select(i)
   turtle.refuel()
  end
  turtle.select(1)
end
end
local function build()
for i = 1, height do
  stairPlaceUp()
end

if width == 2 then
  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
  for i = 1, height do
   stairPlaceDown()
  end
else
  turtle.turnRight()
  turtle.turnRight()
  for i = 1, height+1 do
   turtle.forward()
   turtle.down()
  end
end
end
local function initialize()
w, h = term.getSize()
term.clear()
term.setCursorPos(1,1)
print("Stairs v1.0")
term.setCursorPos(w/2+1, 1)
print("by; soccerboy5411")
for i = 1, w-1 do
  term.setCursorPos(i,2)
  print("-")
end
term.setCursorPos(1,4)
end
function main()
initialize()
refuel()

local ques1 = true
local ques2 = true

while ques1 == true do
  print("How high up? ")
  height = tonumber(read())
  --print(height)
  if height < 1 or height == nil then
   print("Please enter a positive number.")
  else
   ques1 = false
  end
end

while ques2 == true do
  print("Would you like it 1 or 2 blocks wide? ")
  width = tonumber(read())
  --print(width)
  if width > 2 or width < 1 or width == nil then
   print("Please pick 1 or 2 blocks wide.")
  else
   ques2 = false
  end
end

build()
term.clear()
term.setCursorPos(1,1)
finished = true
end

while finished ~= true do
main()
end

soccerboy5411, on 21 September 2012 - 07:34 AM said:

For one it crashes when strings are inputed instead of numbers. But this is a known issue. :P/>/>

local NaN = "boom!"
if tonumber(NaN) == nil then
    print("You must enter a valid number!")
    return
end

Cheers,
George