WHAT!! So Confused

[Tallguy]

Okay so this is my assignment to do. . .

Quote:

1. Create a program which inputs the name of the file to be accessed. The program should use one function to determine whether or not the file can be opened successfully. It should use another function to determine whether or not the file is empty. Save as filechk.t. This program provides a much more elegant manner to determine if a file has opened successfully. It is much better than using assert.

So I don't know what it means, so i asked my teacher, and i'm even more confused. Like what am I suppose to do for this question?

[A.J]

You are supposed to use a turing function that check if the file is opened successfully and another function to check if it is empty. Shouldn't be hard at all.

[Tallguy]

which file?

[A.J]

Oh, I see why you are confused. I am assuming that you have to open a text file, and check if it is successfully opened and if it is empty or not.

[andrew.]

You need:
- File.Exists
- open
- File I/O

[Tallguy]

like would this work?

put "File check program"
put ""
put "What file do you want opened?"
var data : string
var file : int
get data : *
open : file, data, get

put file

**EDIT** providing that there are files in the same place as this file . . .

[Tallguy]

and once i run it, i get '1' for my results

1 of what?????

[A.J]

'1' is the value stored by the variable to signify that it worked (i.e. 1 -> 'true', whereas 0 -> 'false').

Boolean variables store their values as bits (namely, either '0' or '1'). You got a '1' returned, so it worked.

@andrew - you are only supposed to help him, not give him the answers. Next time, I'll report your post.

[Tallguy]

okay, thanks, so wat function would i use to check if there is any data inside the file or not?

and, once it sees that the the file can be opened can i open it afterwards?

[A.J]

Of course you can. However, I won't tell you what the function is. Try looking for it in the help files in turing.

[Tallguy]

Turing:

put "File check program" put "" put "What file do you want opened?...(include file type, .txt/.exe etc)" var answer, filename : string var file : int get filename : * open : file, filename, get var filevar : string if file = 1 then     put "File can be exists"     put ""     put "Do you wish to open the file? Y/N"     get answer     if answer = "Y" or answer = "y" then         open : file, filename, put         put : file,filevar     else         put "Okay"     end if else     put "File does not exist" end if

okay, so its not opening the file ..

[DemonWasp]

What makes you think it's not opening the file? What output do you get, and what were you expecting? Note that what you're putting into the file is "filevar", which isn't initialised (and therefore will be an empty string in Turing, as I recall).

[Tallguy]

well, look @ the the file 'wd.txt', i want the contents of it to be displayed

[Tallguy]

Turing:

var answer, filename : string var file : int var data : string put "File check program" put"This program will open any text files" put "" put "What file do you want opened?...(include file type, .txt/.exe etc)" get filename : * open : file, filename, get if file = 1 then     put "File exists"     put ""     put "Do you wish to open the file? Y/N"     get answer     if answer = "Y" or answer = "y" then         loop             get : file, skip             exit when eof (file)             get : file, data             put data :5..         end loop     else         put "Okay"     end if else     put "File does not exist" end if close:file

EDIT - FIXED - okay so i got it to work for any text file, how would i fix the spacing issues once the text is loaded?

Turing:

put data, " " ..

now my problem is how to check if there is data within the choosen files, can someone point me in the right direction?

[DemonWasp]

The spacing issue is because you're outputting with :5 - meaning 5 spaces per word. What you really want to do is get entire lines at a time ( get : file, data : * ) and then output them as entire lines ( put data ).