Hi everyone,
I haven't been active much on the forums in the past few days (in comparison with the past few months), but I have created a simple Lua program while experimenting on oclua. I have transferred the code into a Lua file on the computer and here it is!
Basically you start with a value of 0 and you can choose to Attack or Defend to try and increase your value. right now I am experimenting with the points system as Attack carries no more risk than Defence and both are as equally likely to win as to lose.

Here is also the source code. Feel free to look through it, comment on my program, how my coding is, any improvements on optimising it or making it easier for another programmer to read, and stuff. The more feedback I get the more I can use the feedback to broaden my understanding of Lua!
--[[Things to do:
Declare variables first within a function
Make things more fun and complex
Points System:
OLD: Atk -{1,2,3} +{4,5} Def +{1,2,3} -{4,5}
NEW: Atk -{4,5} +{4,5} Def +{1,2,3} -{1,2,3}
Any better ways? Maybe make Atk more risky, so it's less about luck]]--
v=0
t=0
r1=0
r2=2
r3=0
r4=2
function on.paint(gc)
gc:drawString("[A]tk or [D]ef?    [R]eset",10,10,"top")
gc:drawString(v,10,30,"top")
if r2==1 then
gc:drawString("Attack was successful. +" .. r1,10,50,"top")
end
if r2==0 then
gc:drawString("Attack was unsuccessful. -" .. r1,10,50,"top")
end
if r4==1 then
gc:drawString("Defence was successful. +" .. r3,10,50,"top")
end
if r4==0 then
gc:drawString("Defence was unsuccessful. -" .. r3,10,50,"top")
end
gc:drawString("Turn " .. t,200,10,"top")
if v~=0 or t~=0 then
gc:drawString("Average " .. v/t,200,30,"top")
end
gc:setFont("sansserif","r",8)
gc:drawString("Numstrat - Jason Ho",10,200,"top")
end
function on.charIn(ch)
cha=ch
if cha=="a" or cha=="d" then
if cha=="a" then
r4=2
r1=math.random(4,5)
r2=math.random(0,1)
if r2==1 then
v=v+r1
end
if r2==0 then
v=v-r1
end
end
if cha=="d" then
r2=2
r3=math.random(1,3)
r4=math.random(0,1)
if r4==1 then
v=v+r3
end
if r4==0 then
v=v-r3
end
end
t=t+1
end
if cha=="r" then
v=0
t=0
r1=0
r2=2
r3=0
r4=2
end
platform.window:invalidate()
end
With my current knowledge, I think a Lua version of my TI-nspire Basic Game, Jason's TI-nspire Hold'em is achievable. I just need to get working on it, persistently

Thanks everyone!

Thanks Nick! That's a great summary of things to fix.
Most of that stuff I was partly aware of already, but just hadn't put in yet.
- So how about if I wanted to display the average up to 2 decimal places? i.e. Fix2?
- cha=ch probably because I changed it from a getchar program I got from jimbauwens and just left it there
- Yes on.create() was what I was looking for thanks
- For a table is that different to a matrix/array/list?
- "if cha=="a" or cha=="d" then if cha=="a" then.." I think I did that because there is t=t+1 at the end. But it would make more sense (and save more space), to put t=t+1 inside the if cha=="a" and if cha=="d" I think then.

Thanks for the help!
I used http://wiki.inspired-lua.org/ for some help.

to mak eit only display 2 decimals after the comma, you can do math.floor(average*10)/10. I don't know if there's another way to do this, but that's my way And i don't think there's an easy way to make it only have to decimals at all...

and i think it's faster to put twice t = t+1 than if since if is a statement, the other one just an addition, which is faster

a table is te same as a list in lua, you don't have two dimensional things. just do e.g.

Code: [Select]

function on.create()
     vars = {0, 0, 0, 2, 0, 2}
end

--this must in the if ch=="a" thingie

if vars[3] = 0 then
     vars[1] = vars[1]+1
end
[code]

this might be a bit more timeconsuming to type, but it think it's more beautiful to see, rather than 5 vars :)
 [/code]

Thanks Nick, I shall update this if I have time.
From what I gather table is equivalent to list
and an array is equivalent to matrix
Thanks!
Hopefully this will just be the beginning of my Journey in Lua

I redefined some variables, I think is more legible this way:

--[[Things to do:
Declare variables first within a function
Make things more fun and complex
Points System:
OLD: Atk -{1,2,3} +{4,5} Def +{1,2,3} -{4,5}
NEW: Atk -{4,5} +{4,5} Def +{1,2,3} -{1,2,3}
Any better ways? Maybe make Atk more risky, so it's less about luck]]--

chance = { [-1] = "",
            [0] = "unsuccessful . -",
            [1] = "successful . +" }

action = { nothing="", attack="Attack", defense="Defense"}

function initialize_variables()
    v = 0
    t = 0
    r1 = 0
    r2 = -1
    state = action.nothing
end

--function on.create()
initialize_variables()
--end

function on.paint(gc)
    gc:setFont("sansserif","r",11)
    gc:setColorRGB(0,0,0)
   
    gc:drawString("[A]tk or [D]ef?    [R]eset",10,10,"top")
    gc:drawString(v,10,30,"top")

    if state == action.attack then
        gc:drawString("Attack was "  .. chance[r2] .. r1, 10, 50, "top")
    elseif state == action.defense then
        gc:drawString("Defense was " .. chance[r2] .. r1, 10, 50, "top")
    end

    gc:drawString("Turn " .. t,200,10,"top")
    if v~=0 or t~=0 then
        gc:drawString("Average " .. round(v/t,2), 200, 30, "top")
    end
    gc:setFont("sansserif","r",8)
    gc:drawString("Numstrat - Jason Ho",10,200,"top")
end

function on.charIn(ch)
    if ch=="a" then
        state = action.attack
        r1=math.random(4,5)
        r2=math.random(0,1)
        if r2==1 then
            v=v+r1
        else    --if r2==0 then
            v=v-r1
        end
        t=t+1
    end

    elseif ch=="d" then
        state = action.defense
        r1=math.random(1,3)
        r2=math.random(0,1)
        if r2==1 then
            v=v+r1
        else    --if r2==0 then
            v=v-r1
        end
        state=action.defense
        t=t+1
    end

    elseif ch=="r" then
        initialize_variables()
    end

    platform.window:invalidate()
end

function round(value, digits)
    return string.format("%." .. digits .. "f", value)
end

"action" was used to classify which actions can be performed when you press a key. I'm not sure if you intend to add more command actions (like flee, heal, steal, etc.), but if you do, you can now easily add them on the table.

"state", behaves as a filter event. It keeps track of the action executed. Then you can control in your program what to do when something happened.

"chance" was created to reduce the amount of lines. Since attack & defense behave alike, you can group them. I added the blank one just in case you want to create something like a "miss" or so. This is an ordered table, so when the variable r2 = 1, chance[r2] is the same as "successful . +"


This link might be helpful for understanding more about how to use tables
http://nixstaller.sourceforge.net/manual/0.2/nixstaller_9.html#Tables

any easy way to rotate a table 90 degrees?

What exactly do you mean by that?

You can transpose matrices I guess.

"action" was used to classify which actions can be performed when you press a key. I'm not sure if you intend to add more command actions (like flee, heal, steal, etc.), but if you do, you can now easily add them on the table.

"state", behaves as a filter event. It keeps track of the action executed. Then you can control in your program what to do when something happened.

"chance" was created to reduce the amount of lines. Since attack & defense behave alike, you can group them. I added the blank one just in case you want to create something like a "miss" or so. This is an ordered table, so when the variable r2 = 1, chance[r2] is the same as "successful . +"


This link might be helpful for understanding more about how to use tables
http://nixstaller.sourceforge.net/manual/0.2/nixstaller_9.html#Tables

Thanks someone, it seems you know a great deal about Lua. Have you got or are planning any Lua projects yourself?

Also it would probably be possible to transpose matrices, you would somehow do a for .... do command to transpose x and y coordinates of each value in the matrix over to the new coordinates.

I think he's talking about your own work. I know you've been doing some edits, optimizations, and remakes, but you could try making your own project. 

As a suggestion, you could try making a Lua sudoku. It'd be easy enough and it'd be pretty nice.