Help needed

Program:

shell.run("clear")
function checkforWalls()
x = 1
while true do
  if walls[x][1] == wanttox and walls[x][2] == wanttoy then return false end
  if walls[x] == nil then return true end
  x = x + 1
end
end
function move()
wanttodir = math.random(1,4)
if wanttodir == 1 then wanttox = xpos  wanttoy = ypos - 1 end
if wanttodir == 2 then wanttox = xpos  wanttoy = ypos + 1 end
if wanttodir == 3 then wanttox = xpos - 1  wanttoy = ypos end
if wanttodir == 4 then wanttox = xpos + 1  wanttoy = ypos end
if checkforWalls() then
  xpos = wanttox
  ypos = wanttoy
end
end
function load()
shell.run(read())
end
function draw()
term.setBackgroundColor(colors.green)
term.clear()
term.setCursorPos(1,1)
x = 1
while true do
  term.setBackgroundColor(colors.red)
  term.setCursorPos(walls[x][1],walls[x][2])
  term.write("X")
  x = x + 1
  if walls[x] == nil then break end
end
end
function drawBug()
term.setCursorPos(xpos,ypos)
term.setBackgroundColor(colors.blue)
term.write("#")
end
load()
while true do
term.setBackgroundColor(colors.black)
draw()
term.setBackgroundColor(colors.black)
drawBug()
term.setBackgroundColor(colors.black)
move()
sleep(0,5)
end

level program:

walls = {{1,1},{1,2},{1,3},{1,4},{1,5},{2,5},{3,5},{4,5},{5,5},{5,4},{5,3},{5,2},{5,1},{4,1},{3,1},{2,1}}
xPos = 2
yPos = 2

I started the program and entered the name of the level program. and then this error came:
[string "window"]:247: bad argument #1 to 'floor' (number expected, got nil)

Here's a short video:
Download

Use ['code'] tags

shell.run("clear")
function checkforWalls()
  x = 1
  while true do
	if walls[x][1] == wanttox and walls[x][2] == wanttoy then return false end
	if walls[x] == nil then return true end
	x = x + 1
  end
end
function move()
  wanttodir = math.random(1,4)
  if wanttodir == 1 then wanttox = xpos wanttoy = ypos - 1 end
  if wanttodir == 2 then wanttox = xpos wanttoy = ypos + 1 end
  if wanttodir == 3 then wanttox = xpos - 1 wanttoy = ypos end
  if wanttodir == 4 then wanttox = xpos + 1 wanttoy = ypos end
  if checkforWalls() then
	xpos = wanttox
	ypos = wanttoy
  end
end

function load()
  shell.run(read())
end

function draw()
  term.setBackgroundColor(colors.green)
  term.clear()
  term.setCursorPos(1,1)
  x = 1
  while true do
	term.setBackgroundColor(colors.red)
	term.setCursorPos(walls[x][1],walls[x][2])
	term.write("X")
	x = x + 1
	if walls[x] == nil then break end
  end
end
function drawBug()
  term.setCursorPos(xpos,ypos)
  term.setBackgroundColor(colors.blue)
  term.write("#")
end

load()

while true do
  term.setBackgroundColor(colors.black)
  draw()
  term.setBackgroundColor(colors.black)
  drawBug()
  term.setBackgroundColor(colors.black)
  move()
  sleep(0,5)
end

Ill get to try fixing the problem, just need the code clear in front of me

[string "window"]:247: bad argument #1 to 'floor' (number expected, got nil)

This means:
The window API erred on line 247, because when it passed a "number" to math.floor, the number was nil. term.setTextColor and term.setBackgroundColor are probable culprits.

It will also malfunction because you have written sleep(0,5) with a comma, its supposed to be sleep(0.5)

Doyle3694, on 06 October 2014 - 04:22 PM said:

It will also malfunction because you have written sleep(0,5) with a comma, its supposed to be sleep(0.5)

That will not error, simply act as sleep(0). Lua ignores additional arguments.

Exactly, it will malfunction, IE not work as he intended it to

"xpos" is not the same thing as "xPos". Ditto for ypos/yPos. Capitalisation matters.

As of CC 1.6, the window API is used automatically by advanced computers whenever most term functions are called.

KingofGamesYami, on 06 October 2014 - 04:16 PM said:

[string "window"]:247: bad argument #1 to 'floor' (number expected, got nil)

This means:
The window API erred on line 247, because when it passed a "number" to math.floor, the number was nil. term.setTextColor and term.setBackgroundColor are probable culprits.

Bomb Bloke, on 07 October 2014 - 02:20 AM said:

"xpos" is not the same thing as "xPos". Ditto for ypos/yPos. Capitalisation matters.

As of CC 1.6, the window API is used automatically by advanced computers whenever most term functions are called.

Thank you for your answers. I think the Problem is xPos and yPos in the level program. I'll fix it tomorrow.

Timo_Ho, on 06 October 2014 - 03:14 PM said:

Program:

shell.run("clear")
function checkforWalls()
x = 1
while true do
  if walls[x][1] == wanttox and walls[x][2] == wanttoy then return false end
  if walls[x] == nil then return true end
  x = x + 1
end
end
function move()
wanttodir = math.random(1,4)
if wanttodir == 1 then wanttox = xpos  wanttoy = ypos - 1 end
if wanttodir == 2 then wanttox = xpos  wanttoy = ypos + 1 end
if wanttodir == 3 then wanttox = xpos - 1  wanttoy = ypos end
if wanttodir == 4 then wanttox = xpos + 1  wanttoy = ypos end
if checkforWalls() then
  xpos = wanttox
  ypos = wanttoy
end
end
function load()
shell.run(read())
end
function draw()
term.setBackgroundColor(colors.green)
term.clear()
term.setCursorPos(1,1)
x = 1
while true do
  term.setBackgroundColor(colors.red)
  term.setCursorPos(walls[x][1],walls[x][2])
  term.write("X")
  x = x + 1
  if walls[x] == nil then break end
end
end
function drawBug()
term.setCursorPos(xpos,ypos)
term.setBackgroundColor(colors.blue)
term.write("#")
end
load()
while true do
term.setBackgroundColor(colors.black)
draw()
term.setBackgroundColor(colors.black)
drawBug()
term.setBackgroundColor(colors.black)
move()
sleep(0,5)
end

level program:

walls = {{1,1},{1,2},{1,3},{1,4},{1,5},{2,5},{3,5},{4,5},{5,5},{5,4},{5,3},{5,2},{5,1},{4,1},{3,1},{2,1}}
xPos = 2
yPos = 2

I started the program and entered the name of the level program. and then this error came:
[string "window"]:247: bad argument #1 to 'floor' (number expected, got nil)

Here's a short video:
Download

ok i fixed it but there is a new error at line 8 it says attempt to call nil

main program:

wanttodir = 1
wanttox = 1
wanttoy = 1
shell.run("clear")
function checkforWalls()
x = 1
while true do
  if walls[x][1] == wanttox and walls[x][2] == wanttoy then return "false" end
  if walls[x] == nil then return "true" end
  x = x + 1
end
end
function move()
wanttodir = math.random(1,4)
if wanttodir == 1 then wanttox = xpos  wanttoy = ypos - 1 end
if wanttodir == 2 then wanttox = xpos  wanttoy = ypos + 1 end
if wanttodir == 3 then wanttox = xpos - 1  wanttoy = ypos end
if wanttodir == 4 then wanttox = xpos + 1  wanttoy = ypos end
state = checkforWalls()
if state == "true" then
  xpos = wanttox
  ypos = wanttoy
end
end
function load()
shell.run(read())
end
function draw()
term.setBackgroundColor(colors.green)
term.clear()
term.setCursorPos(1,1)
x = 1
while true do
  term.setBackgroundColor(colors.red)
  term.setCursorPos(walls[x][1],walls[x][2])
  term.write("X")
  x = x + 1
  if walls[x] == nil then break end
end
end
function drawBug()
term.setCursorPos(xpos,ypos)
term.setBackgroundColor(colors.blue)
term.write("#")
end
load()
while true do
term.setBackgroundColor(colors.black)
draw()
term.setBackgroundColor(colors.black)
drawBug()
term.setBackgroundColor(colors.black)
move()
sleep(0,5)
end

level:

walls = {{1,1},{1,2},{1,3},{1,4},{1,5},{2,5},{3,5},{4,5},{5,5},{5,4},{5,3},{5,2},{5,1},{4,1},{3,1},{2,1}}
xpos = 2
ypos = 2

please help me!!

That line would not be giving you an attempt to call a nil value, it might give you an attempt to index a nil value. in which case change

  if walls[x][1] == wanttox and walls[x][2] == wanttoy then return "false" end
  if walls[x] == nil then return "true" end

These lines to this:

  if walls[x] == nil then return "true" end
  if walls[x][1] == wanttox and walls[x][2] == wanttoy then return "false" end

Dragon53535, on 12 October 2014 - 01:04 PM said:

That line would not be giving you an attempt to call a nil value, it might give you an attempt to index a nil value. in which case change

  if walls[x][1] == wanttox and walls[x][2] == wanttoy then return "false" end
  if walls[x] == nil then return "true" end

These lines to this:

  if walls[x] == nil then return "true" end
  if walls[x][1] == wanttox and walls[x][2] == wanttoy then return "false" end

thanks! I'll try this

ok the program works fine now i'll add a level editor and then upload it.
you can download all my programs at timosmods.yolasite.com !