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Aug 10th, 2009

file handling

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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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sara khan

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Aug 10th, 2009

Re: file handling

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 =).

jen140

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Aug 10th, 2009

Re: file handling

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

for example if text file contains the following text

Quote ...

Hello, World

and if you execute the following psuedo Code

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

Laiq Ahmed

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Aug 10th, 2009

Re: file handling

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

sara khan

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Aug 10th, 2009

Re: file handling

Click to Expand / Collapse Quote 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.

VernonDozier

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