Reactor on/off + display of state

I've been beating my head with this for quite a bit now but I can't seem to figure it out.

I'm basically trying to have a small display of information with the reactor's state (on or off) and by inputting On or Off, to turn it on or off, obviously.

This is the code. When I run it it returns "reactor:1: attempt to call nil".

What do?

Spoiler

reactor=rs.getoutput("bottom")

if reactor == false then

reactor="Reactor is Online"

end



if reactor==true then

reactor="Reactor is Offline"

end



shell.run("clear")

local function centertext(text)

local x,y=term.getsize()

local x2,y2=term.getCursorpos()

term.setcursorpos(math.ceil((x/2)-(text:len())))

print(text)

end



centertext("VaultTech205 Control Panel")

centertext("V10.5")

centertext(" ")

centertext("Available Commands")

print(" ")

centertext("Reactor is online : Reactor is Offline")

print(" ")

centertext("Current States")

print(" ")

centertext("Power",reactor)

centertext(reactor)

write("Console: ")



input=read()



if input=="On" then

rs.setoutput("bottom",false)

print("Reactor is now Online.")

end



if input=="Off" then

rs.setoutput("bottom", true)

print("Reactor is now Offline.")

end



sleep(2)

shell.run("clear")

Change line 1 to

local reactor = rs.getOutput("bottom")

You've made this same mistake throughout the code and on multiple functions. Remember Lua is case sensitive.

Check the api's on the wiki for proper case.

It's also better to make your vars local. Globals can get messy.

Ah, damn. Got it.

Thanks for the help.

Spoiler

local reactor=rs.getOutput("bottom")

if reactor == false then

reactor="Reactor is Online"

end



if reactor==true then

reactor="Reactor is Offline"

end



shell.run("clear")

local function centerText(text)

local x,y=term.getSize()

local x2,y2=term.getCursorPos()

term.setCursorPos(math.ceil((x/2)-(text:len())))

print(text)

end



centerText("VaultTech205 Control Panel")

centerText("V10.5")

centerText(" ")

centerText("Available Commands")

print(" ")

centerText("Reactor is online : Reactor is Offline")

print(" ")

centerText("Current States")

print(" ")

centerText("Power",reactor)

centerText(reactor)

write("Console: ")



input=read()



if input=="On" then

rs.setOutput("bottom",false)

print("Reactor is now Online.")

end



if input=="Off" then

rs.setOutput("bottom", true)

print("Reactor is now Offline.")

end



sleep(2)

shell.run("clear")

This is what I have now.
I'm getting "reactor:27: bad argument: int expected, got nil"

Change your centerText() function to this

local function centerText(text)
local x,y=term.getSize()
local x2,y2=term.getCursorPos()
term.setCursorPos(math.ceil((x / 2) - (text:len() / 2)), y2) -- you missed the y, only had x
print(text)
end

It works now, many thanks again. :]