Concerning Lua Coding...

BWAWHAHA, crait

Ha, I knew it!

[crait]

It was pretty fun.
And I never knew what the concatenation sign in LUA was.

DAMN IT...

I was gonna do that when I got free time...

[crait]

Beat ya to it again! Muhahaha!

Well, I'll just have Manda give me a PB&J

[crait]

I like those. She gives very good PB&J's!!
Almost as good as Jessica.

But not nearly as gewd as whitney

#1 Shut up! Don't talk sh*t!

#2 Who???

#3 I need your help. PM me.

Umm...that was a little bit clearer. But thanks for the long and detailed elaboration

[crait]

Haha. Just read it all the way through instead of skipping around and it should be kinda like a story.
But no problem!

I did read it all the way

Hellz yeah! My turn

keys = {
{ "C", "sin", "cos", "tan" },
{ "1/x", "x^2", "sqr", "/" },
{ "7", "8", "9", "*" },
{ "4", "5", "6", "-" },
{ "1", "2", "3", "+" },
{ "0", "+/-", ".", "=" } }
This is just an array, basicly, how it will map out in the end.


color = Color.new(0, 255, 0)
Just your average varible

function drawRect(x0, y0, w, h)
screen:drawLine(x0, y0, x0+w, y0, color)
screen:drawLine(x0, y0, x0, y0+h, color)
screen:drawLine(x0+w, y0, x0+w, y0+h, color)
screen:drawLine(x0+w, y0+h, x0, y0+h, color)
end
This is a userdefined function. It draws a rectangle.

oldPad = Controls.read()
x = 1
y = 1
text = "0"
lastNumber = 0
deleteOnKey = true
lastOperation = ""
value = ""
number = 0
[color=red]More varibles. All for various reasons.

while true do
"While" starts the main loop. It will continue to run until the loop is broken.

pad = Controls.read()
if pad ~= oldPad then
if pad:triangle() then
screen:save("calculator.tga")
end A screenshot function

if pad:left() then
x = x - 1
if x == 0 then
x = 4
end
end
if pad:right() then
x = x + 1
if x == 5 then
x = 1
end
end
if pad:up() then
y = y - 1
if y == 0 then
y = 6
end
end
if pad:down() then
y = y + 1
if y == 7 then
y = 1
end
endThe directional if statements. They correspond with the draw rect function above. Also, if the max space has been reached it makes it "warp" to the other side.

if pad:cross() then
value = keys[y][x]
number = tonumber(text)
if value == "C" then
The functions part
text = "0"
lastNumber = 0
lastOperation = ""
deleteOnKey = true
elseif value == "1/x" then
text = tostring(1/number)
elseif value == "sin" then
text = tostring(math.sin(number))
elseif value == "cos" then
text = tostring(math.cos(number))
elseif value == "tan" then
text = tostring(math.tan(number))
elseif value == "x^2" then
text = tostring(number*number)
elseif value == "sqr" then
text = tostring(math.sqrt(number))
elseif value == "/" or value == "*" or value == "-" or value == "+" or value == "=" then
if lastOperation == "/" then
text = tostring(lastNumber / number)
elseif lastOperation == "*" then
text = tostring(lastNumber * number)
elseif lastOperation == "-" then
text = tostring(lastNumber - number)
elseif lastOperation == "+" then
text = tostring(lastNumber + number)
end
number = tonumber(text)
if value == "=" then
text = tostring(number)
lastOperation = ""
else
lastNumber = number
lastOperation = value
end
deleteOnKey = true
elseif value == "+/-" then
text = tostring(-number)
else
if deleteOnKey then
text = value
deleteOnKey = false
else
text = text .. value
end
end
end
if pad:start() then
break
end
oldPad = pad
end
I'm kinda lazy, so if you want this part explained just ask.


screen:clear()
yk = 0
w = 40
h = 30
drawRect(w, 0, w * 4, h-2)
screen:print(w+4, 4, text, color)
for yindex,line in ipairs(keys) do
for xindex,key in ipairs(line) do
x0 = xindex * w
y0 = yindex * h
drawRect(x0, y0, w, h)
if xindex == x and yindex == y then
screen:fillRect(x0, y0, w, h, color)
foreground = Color.new(0, 0, 0)
else
foreground = color
end
screen:print(x0 + 5, y0 + 5, key, foreground)
end
end
screen.waitVblankStart()
screen.flip()
The code that displays everything.
end
The end of the script.

Sorry Rox, Crait's was more clearer

Duh!

What don't you understand from mine and crait's?

All of it. I don't know, the way you say it doesn't make sense to me at all. I think I'm being ot much of a bother :S