Reading Files, Help Needed

[Guest]

Whenever I have a game and a save file, if the file doesnt exists, it creates a new one then saves. If the file exists, it checks for the saved data, then overwrights it. But the problem is, that if I clear all the data from the file, but I dont delete the file, I get an error because the save procedure knows the file exists, but it can't use the "get:" because there is nothing to "get" from the file.

So my question is:
"How can I make it so I can read the file and determine if nothing is in it without the error message?"

NOTE: I can't remember if I fixed this error before, because we worked lots with files in school. Does it have to do with eof or something?

[Cervantes]

vahnx wrote:

"How can I make it so I can read the file and determine if nothing is in it without the error message?"

Is there a File.Size function, or something of the sort, that returns the number of bytes the file is? If so,

code:

File.Size(filename) = 0

would determine whether the file is empty or not.

If not, then try something like this:

code:

var line : string var lines := 0 % open file loop     exit when eof(file_stream)     get : file_stream, line     lines += 1 end loop if lines = 0 then     % file is empty else     % file is not empty end if

[TheOneTrueGod]

Or, even better, take what Cervantes posted and turn it into a function, so you have your very own File.Size function

[Cervantes]

Exactly. Except that would be more along the lines of a File.Empty functon.

code:

function FileSize(filename : string) : int     var f_stream : int     var line : string     var bytes := 0     open : f_stream, filename, get     loop         exit when eof (f_stream)         get : f_stream, line         bytes += length (line)     end loop     result bytes end FileSize

You might have to add some to 'bytes' to account for newlines "\r\n" (or is it "\n\r"?)

[Guest]

I dont know what I did but I need help! I somehow messed up my game and I cant fix it. The one I posted in the Source section was working, and now somehow isnt??? I dont rreember removing anything. I need help badly

[MysticVegeta]

read the code on that section that you posted, it reads in from a file that does NOT exist, how do you expect it to work without outputting an error?

[Guest]

Ok i think im getting it to work now. I must of been half way on doing that, and saved it and put it on the forums thinking it was done, or something.