23 posts
Posted 21 February 2014 - 11:16 PM
So I was making a little test program just for a bit of fun and to refresh my memory on LUA programming and ran into a slight problem while testing it. Every time I execute the program it returns the error:
bios:339: [string "maze"]:30: 'end' expected (to close 'while' at line 9)
I understand that it is telling me to add an end to close the while loop I started at line 9. However, I have a lot more code that must be executed within the while loop and so if I close it that code will not be executed. So could one of you Pros check my code and find out what to do to fix this error.
--Variables
local completed = false
local modem = peripheral.wrap("right")
local x = 1
local y = 1
local dir = 270
--Movement
while completed == false do
if turtle.getFuelLevel() < 16 then
turtle.refuel(1)
end
if turtle.detect() then
turtle.turnLeft()
dir = dir + 90
if turtle.detect() then
turtle.turnRight()
turtle.turnRight()
dir = dir - 180
if turtle.detect() then
turtle.turnRight()
dir = dir - 90
turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
--Send Coordinates
if dir >= 360 then
dir = dir - 360
end
if dir < 0 then
dir = dir + 360
end
if dir == 0 then
x = x + 1
end
else if dir == 90 then
y = y + 1
end
else if dir == 180 then
x = x - 1
end
else if dir == 270 then
y = y - 1
end
end
modem.transmit(1, 1, x)
modem.transmit(2, 2, y)
--Check at end
turtle.select(16)
if turtle.compareDown() then
turtle.up()
turtle.up()
turtle.up()
completed = true
shell.run("dance")
end
turtle.select(1)
print("X: "..x.." Y: "..y)
end
882 posts
Location
Behind you.
Posted 22 February 2014 - 12:13 AM
When using elseif, you don't need to use else if (check) then (code) end else if bla bla bla
You could just use elseif (check) then (code) elseif (check) then (code)
That might help.
if true then
print(" hai ")
else
if false then
print("bork")
end
end
--vs
if true then
print(" hai ")
elseif false then
print("bork")
end
Edited on 21 February 2014 - 11:20 PM
23 posts
Posted 22 February 2014 - 12:26 AM
When using elseif, you don't need to use else if (check) then (code) end else if bla bla bla
You could just use elseif (check) then (code) elseif (check) then (code)
That might help.
If I understood you correctly and changed the code correctly then that did not work. Maybe you could copy the code into your own turtle, edit it how you said to. Then test to see if it works. If it works then can you paste the code back here and let me know.
882 posts
Location
Behind you.
Posted 22 February 2014 - 12:40 AM
--Variables
local completed = false
local modem = peripheral.wrap("right")
local x = 1
local y = 1
local dir = 270
--Movement
while completed == false do
if turtle.getFuelLevel() < 16 then
turtle.refuel(1)
end
if turtle.detect() then
turtle.turnLeft()
dir = dir + 90
if turtle.detect() then
turtle.turnRight()
turtle.turnRight()
dir = dir - 180
if turtle.detect() then
turtle.turnRight()
dir = dir - 90
turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
--Send Coordinates
if dir >= 360 then
dir = dir - 360
end
if dir < 0 then
dir = dir + 360
end
if dir == 0 then
x = x + 1
elseif dir == 90 then
y = y + 1
elseif dir == 180 then
x = x - 1
elseif dir == 270 then
y = y - 1
end
modem.transmit(1, 1, x)
modem.transmit(2, 2, y)
--Check at end
turtle.select(16)
if turtle.compareDown() then
turtle.up()
turtle.up()
turtle.up()
completed = true
shell.run("dance")
end
turtle.select(1)
print("X: "..x.." Y: "..y)
end
c:
Edited on 21 February 2014 - 11:41 PM
23 posts
Posted 22 February 2014 - 01:09 AM
--Variables
local completed = false
local modem = peripheral.wrap("right")
local x = 1
local y = 1
local dir = 270
--Movement
while completed == false do
if turtle.getFuelLevel() < 16 then
turtle.refuel(1)
end
if turtle.detect() then
turtle.turnLeft()
dir = dir + 90
if turtle.detect() then
turtle.turnRight()
turtle.turnRight()
dir = dir - 180
if turtle.detect() then
turtle.turnRight()
dir = dir - 90
turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
--Send Coordinates
if dir >= 360 then
dir = dir - 360
end
if dir < 0 then
dir = dir + 360
end
if dir == 0 then
x = x + 1
elseif dir == 90 then
y = y + 1
elseif dir == 180 then
x = x - 1
elseif dir == 270 then
y = y - 1
end
modem.transmit(1, 1, x)
modem.transmit(2, 2, y)
--Check at end
turtle.select(16)
if turtle.compareDown() then
turtle.up()
turtle.up()
turtle.up()
completed = true
shell.run("dance")
end
turtle.select(1)
print("X: "..x.." Y: "..y)
end
c:
Sorry, but it didn't work for me.
7083 posts
Location
Tasmania (AU)
Posted 22 February 2014 - 01:26 AM
if turtle.detect() then
turtle.turnLeft()
dir = dir + 90
if turtle.detect() then
turtle.turnRight()
turtle.turnRight()
dir = dir - 180
if turtle.detect() then
turtle.turnRight()
dir = dir - 90
turtle.forward()
end -- ** What's this doing there? **
else turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
23 posts
Posted 22 February 2014 - 06:56 AM
if turtle.detect() then
turtle.turnLeft()
dir = dir + 90
if turtle.detect() then
turtle.turnRight()
turtle.turnRight()
dir = dir - 180
if turtle.detect() then
turtle.turnRight()
dir = dir - 90
turtle.forward()
end -- ** What's this doing there? **
else turtle.forward()
end
else turtle.forward()
end
else turtle.forward()
end
thanks, that worked.