Help with eof

[chipanpriest]

Hey guys. I'm making a game that stores a high score onto a text file and I need some help. Now, I do have basic understanding of open, close, put, get, seek so I'm not entirely lost. The code I am using is similar to this:

Turing:

var f : int var high : int %highscore variable %makes the text file open : f, "highscore.txt", put close : f %/makes the text file open : f, "highscore.txt", get get : f, high close : f

The error says it is attempting to read past the end of file (eof) and I understand what the problem is. There is nothing in the text file so it cant get anything out of it. What I need help with is if somebody could tell be how I could get the program to ignore the get statement if there is nothing in the text file. Any help will be greatly appreciated!

I aim to have something like this:

Turing:

if eof (f) then     high := 1 else     get : f, high end if

EDIT
I fixed the problem I was having but I ran into another one. Now when I exit the program, it doesn't save the highscore to my text file even though I told it to. This is the code I'm using:

Turing:

if lose = true then         if lvl > high then             open : f, "highscore.txt", put, mod, seek             put : f, lvl             close : f         end if         lvl := 1     end if

[chipanpriest]

When I exit the program and start it back up, my highscore is reset and I was curious as to why so I opened up my text file and there was nothing in it! Yet you even saw the code I posted. Should it not put my highscore into the text file??

[Tony]

sorry, my post was in reply to before your edit, so I deleted it.

Do you know that your code even tries to write anything? You can check for what with

code:

... put "Writing highscore" open : f, "highscore.txt", put, mod, seek ...

Maybe your if-conditions are not true?

Also, it seems that the file will hold at most one value. In which case you are not using mod, seek options.

[chipanpriest]

Here, maybe you aren't getting enough code to judge if there is a problem or not. Ill post more code and I'll just attach the file.

Turing:

open : f, "highscore.txt", put close : f %------------------------------ open : f, "highscore.txt", get if eof (f) then     high := 1 else     get : f, high end if close : f %------------------------------ if lose = true then     if lvl >= high then         open : f, "highscore.txt", put, mod, seek         put : f, lvl         close : f     end if     lvl := 1 end if

[Dreadnought]

This

Turing:

open : f, "highscore.txt", put close : f

Erases the contents of the text file.

You said you wanted to make sure a highscores file exists (edit: I felt that was what you wanted to do). Read up on the File module, it has just what you need.

[chipanpriest]

ooohhhhh thanks so much i didnt know that erased it haha xD

[chipanpriest]

Yea! It works now guys! Thanks dreadnaught all i did was change this:

Turing:

open : f, "highscore.txt", put close : f

to this:

Turing:

if File.Exists ("highscore.txt") = false then     open : f, "highscore.txt", put     close : f end if

[Alex C.]

using the same idea, is it possible to create a save file for a game?

[Tony]

Yes. The only difference is that instead of a single value, you'd write enough to reconstruct the state of the game.

[chipanpriest]

Does turing allow you to encrypt saved files into the program file? Or am I going to need a separate text file for every game i decide to have a save for?