Issues with saving high scores in lua - file-io

Question

function saveScore()
local path = system.pathForFile("scoredata001.txt", system.DocumentsDirectory)
local file = io.open(path, "w")
if file then
local score=get_score() --The get_score() returns the value of current score which is saved in 'score'.
local newScore = compareScore()
local contents = tostring( newScore )
file:write( contents )
io.close( file )
return true
else
print("Error: could not write Score")
return false
end
end
function loadScore()
local path = system.pathForFile("scoredata001.txt", system.DocumentsDirectory)
local contents = ""
local file = io.open( path, "r" )
if file then
local contents = file:read( "*a" )
local score = tonumber(contents);
io.close( file )
return score
end
print("Could not read scores from scoredata.txt")
return nil
end
function return_highScore()
local highscore=loadScore()
if highscore==nil then
highscore=0
end
return highscore
end
function compareScore()
local highscore=return_highScore()
if highscore then
local currscore=get_score()
if highscore==0 then
return highscore
elseif currscore>highscore then
return currscore
end
end
return true
end
function disp_permScore()
local display_score=return_highScore()
text_display2= display.newText("GAME OVER!\n BEST: " ..display_score, 0, 0, "Helvetica", 80)
text_display2.x = centerX
text_display2.y = centerY
text_display2.alpha=1
function gameOver()
mainScreen()
saveScore()
disp_permScore()
end
(This is with refernce to previous question Permission issues in lua )
Basically I'm trying to build a game in lua (This is my first ever game)
But, I'm unable to save highscore to file. If it gets saved, then I'm unable to retrieve them. (In short, I always some or the other error/problem in executing the code.
Please have a look at the code above. I want to display both high score and current score. Current score is being displayed perfect. This is something I tried yesterday night. But now, the high score is not being saved in file. (i.e. the best always displays 0) Also, the cmd says "unable to read scores form scoredata.txt) I'm unable to find where I went wrong.
Please help with this?
Please tell where do I go wrong?
Also, if possible, provide (or edit) the correct code please?

Answer 1

There seems to be a problem on this line
if highscore==0
then
return highscore
Meaning you check if the highscore is 0 and if it is then you return it instead of the actual higher score.
Also, I don't know if your code was just pasting error, but without indenting your code it becomes really hard to read. Try and look again I indentet it and now the error becomes really easy to spot.