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Join Date: Mar 2009

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sara khan

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file handling

Aug 10th, 2009

Hello..,,
I have read about a function used in file handling named as "peek".
If anyone knows about this function then plz tell me.....

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Join Date: Jan 2009

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jen140

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Re: file handling

Aug 10th, 2009

I've found 4 functions with start "Peek" (and they was found at win32.hlp, that you could find with google), that are:
PeekConsoleInput
PeekMessage
PeekNamedPipe
PeekPenInput
Searching on msdn will give you the required information, hope it helps =).

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Laiq Ahmed Laiq Ahmed is offline

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Re: file handling

Aug 10th, 2009

peek basically reads the next available character without moving the file pointer.

for example if text file contains the following text

•

Hello, World

and if you execute the following psuedo Code

 Help with Code Tags 
 cpp Syntax (Toggle Plain Text) 
int main ()
{
   // open stream.
   char v =  f.peek();
 
 // the below line will print 'H' but will not extract this character from stream.
  cout << v <<endl;
}
int main ()
{
   // open stream.
   char v =  f.peek();

 // the below line will print 'H' but will not extract this character from stream.
  cout << v <<endl;
}

if you don't want to move your reading cursor and wants to check which character will be read next you should use peek.

Last edited by Laiq Ahmed; Aug 10th, 2009 at 6:10 am. Reason: add the code tag

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Join Date: Mar 2009

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sara khan

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Re: file handling

Aug 10th, 2009

can u tell me from where I can get more information about file handling and the functions of it..

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VernonDozier VernonDozier is offline

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Re: file handling

Aug 10th, 2009

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Originally Posted by sara khan

can u tell me from where I can get more information about file handling and the functions of it..

Google it! "C++ peek" gives the following as the first link.

http://www.cplusplus.com/reference/i.../istream/peek/

Bookmark the entire site.

http://www.cplusplus.com

It's your first stop before you ask a question on a forum. Type what you are asking about in its search engine. It has all the functions and all the libraries and examples. And a tutorial section.

http://www.cplusplus.com/doc/tutorial/

Bookmark that too.

Scroll down till you get to the "Input/Output With Files" section.

http://www.cplusplus.com/doc/tutorial/files/

If you don't like this site, type "C++ tutorial" into google or Daniweb or wherever. You need to do all of this before posting.