feof

[Joriveek]

Hi,

If I use while(!feof( FileRead )), it reads each line from my input file
until it encounters an empty space or so,

but when I have empty spaces within one line, it is not working, it is only
reading until it finds the first empty space. But I want to read all line
and then go to next line when the characters start from \n (second line),

hw can i read this?

Thanks
J.

 

[Mike Wahler]

Hi,

If I use while(!feof( FileRead )), it reads each line from my input file
until it encounters an empty space or so,

No, 'feof()' does not read anything. It simply tells you
whether the last input request for the stream denoted by
'FileRead' tried to read *past* end the of the file.

but when I have empty spaces within one line, it is not working, it is
only reading until it finds the first empty space. But I want to read all
line and then go to next line when the characters start from \n (second
line),

hw can i read this?

Use 'fgets()'. Be sure to test its return value before
proceeding with further i/o on the stream (See its
documentation for the possible return values and their
meanings).

Also see the C FAQ for why you should not test for EOF
before reading, but *after*.
http://www.eskimo.com/~scs/C-faq/faq.html
(See section 12)

-Mike

 

[Emmanuel Delahaye]

Joriveek wrote on 13/09/05 :

If I use while(!feof( FileRead )), it reads each line from my input file
until it encounters an empty space or so,

Non. It will probably acts like an infinite loop, unless you provide a
read function. But even in this case, the behaviour is wrong, because
feof() has a meaning only after an end of reading has occur. feof() and
ferror() can be used (rarely, actually) to determine the cause of the
stop.

but when I have empty spaces within one line, it is not working, it is only
reading until it finds the first empty space. But I want to read all line and
then go to next line when the characters start from \n (second line),

hw can i read this?

Read the FAQ, please.

http://www.eskimo.com/~scs/C-faq/faq.html

You should use a reading I/O function (fgetc(), fgets(), fread() etc.)
and test the return value to detect the end of the reading.


--
Emmanuel
The C-FAQ: http://www.eskimo.com/~scs/C-faq/faq.html
The C-library: http://www.dinkumware.com/refxc.html

I once asked an expert COBOL programmer, how to
declare local variables in COBOL, the reply was:
"what is a local variable?"

 

[Joriveek]

Thanks fgets() is of a great help, but it is only reading first line from my
input file, what should I make this to read all other lines?

Thanks
J.

 

[Chris Dollin]

Thanks fgets() is of a great help, but it is only reading first line from
my input file, what should I make this to read all other lines?

Call it again?

[It's very hard to see what you're doing wrong, if we can't see what
you're doing at all.]

 

[Irrwahn Grausewitz]

Please don't top-post. Fixed.

Did you read the FAQ already?

Thanks fgets() is of a great help, but it is only reading first line from my
input file, what should I make this to read all other lines?

No, you didn't read the FAQ. Sigh.

General answer:
get yourself a decent textbook on C, I recommend "The C Programming
Language" by Brian W. Kernighan and Dennis M. Ritchie, 2nd edition

Specific answer:
use a loop

Oh, and read the FAQ, please.

Best regards

 

[Joriveek]

Thanks I sorted out

Please don't top-post. Fixed.


Did you read the FAQ already?


No, you didn't read the FAQ. Sigh.

General answer:
get yourself a decent textbook on C, I recommend "The C Programming
Language" by Brian W. Kernighan and Dennis M. Ritchie, 2nd edition

Specific answer:
use a loop

Oh, and read the FAQ, please.

Best regards
--
Irrwahn Grausewitz ([email protected])
welcome to clc : http://www.ungerhu.com/jxh/clc.welcome.txt
clc faq-list : http://www.faqs.org/faqs/C-faq/faq/
clc frequent answers: http://benpfaff.org/writings/clc

 

[Emmanuel Delahaye]

Joriveek wrote on 14/09/05 :

Thanks fgets() is of a great help, but it is only reading first line from my
input file, what should I make this to read all other lines?

Consider a code structure like while()...

Time to open a C-book...

--
Emmanuel
The C-FAQ: http://www.eskimo.com/~scs/C-faq/faq.html
The C-library: http://www.dinkumware.com/refxc.html

"There are 10 types of people in the world today;
those that understand binary, and those that dont."

 

[Keith Thompson]

Thanks I sorted out

Great.

Again, please don't top-post. Your response belongs below any quoted
text, and you should trim anything that isn't relevant. The idea is
that each followup should be readable by itself, from top to bottom.
See nearly any article this newsgroup for an example.