All language subtitles for 12. Introducing EOF (End of File)

Well, hello there.

And in this video, we are going to talk about something that is called EAF or basically and of file.

So remember the backslash zero that was used for strings to indicate the end of a string?

So the Backslash Zero character was used to indicate the end of a particular string.

So something very similar to this concept will also apply for files.

We need a way to represent the end of a file and there is a special character that is being used for

exactly this task, just like the backslid zero four strings, we will use a special character called

EAF that indicates the end of a given file.

Usually the value of this special character is just minus one.

But please note that although there is some similarity, there is a major difference between the backslash

zero four strings in C and the EAF character used to indicate the end of the file.

And the difference is that a backslash zero is actually stored as part of the string.

OK, we've seen it as the last character.

But the EAF character at the end of final indicator is actually not store this part of the file.

The EAF character is basically not stored at the end of the file as the Backslash Zero does, OK?

It's simply just an indicator to the lower level system that this is it.

This is the end of the file.

All right.

And the reason for that is that EAF is simply some sort of ESP. fire to indicate to another layer.

We are not going there in these course, probably, but it is just an indicator to a lower level to

specify that we reached the end of these given file and we can basically make any conclusions, make

some conclusions out of it.

OK, that's much more advanced topic, but at least you should be aware with just the basic the overall

idea of working with end of files.

So simply said, we can't read all the characters of a particular file by using some wire loop and some

get s f getsy function until we reach a character that is equal to EAF.

I will show you a nice example in the next video.

And yeah, OK, so yeah.

So just remember that EAF will be represented as a character that specifies the end of the file.

But this character is not actually part of your given file because it is just an indicator to the lower

level system.

So yeah, this is it for this video.

Guys, I hope I made it very clear to you and.

Yeah.

So yeah.

Thank you so much for watching.

And now, just before we move on, one thing that I also want you to know is that there is also a function

that is called F EAF, which means file and the file and these function basically gets a pointer to

a file.

OK, you can see that here.

We will specify probably VFP, OK?

And it will tell us either the current position is the end of the file or not.

So in what situation it will be used.

So for example, you have like you can use the for you can use these function.

For example, you would like to know as long as let's remove it from here, as long as you didn't reach

the end of the file so you can specify it like this.

So file while while you haven't reached the end of the file.

So f youcef f o f f b so as long as you didn't reach the end of the file, you will be doing the body

of this loop.

In this case, I don't know.

I don't know what you want to write here.

Let's go like some code.

That's it.

OK, so these while Loop will specify, as long as you didn't reach the end of the file, keep on doing

some code.

And once you do reach the end of the while, the condition is going to be false and you will move out

of the while loop.

So thank you guys for watching Youcef F off.

That's it.

Until the next time by.