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c file to extract real value from a txt file

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# 8  
Old 02-04-2008
Quote:
Originally Posted by user_prady
Dear Friends,

I am really in a great problem.
My problem is as follows

If I will send a counter to a function in c like read_line(counter);

Then it will read that line only which counter is pointing ,
Suppose I ve txt file like below

abc.txt
12.1
13.2
14.4

Then If I'll call the function as read_line(2);

It should read the 2nd line only and then put that value to a double pointer..

I mean one function call should read only the specified row,, and store it to a double pointer..

I need help badly..
One way you could do this is by moving the sscanf part of the code into the read_line() function. This way you just need to increment the variable by 1 after every call to fgets. After calling fgets you can invoke read_line() and pass the counter as an argument to it and inside read_line() the double floating number will be stored at the address specified by the double pointer using sscanf.
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LEARN ABOUT PHP

phardata.extractto

PHARDATA.EXTRACTTO(3)							 1						     PHARDATA.EXTRACTTO(3)

PharData::extractTo - Extract the contents of a tar/zip archive to a directory

SYNOPSIS

       bool PharData::extractTo (string  $pathto, [string|array  $files], [bool  $overwrite = false])

DESCRIPTION

	Extract  all  files  within  a tar/zip archive to disk. Extracted files and directories preserve permissions as stored in the archive. The
       optional parameters allow optional control over which files are extracted, and whether existing files on disk can be overwritten. The  sec-
       ond  parameter files can be either the name of a file or directory to extract, or an array of names of files and directories to extract. By
       default, this method will not overwrite existing files, the third parameter can be set to true to enable overwriting of files. This  method
       is similar to ZipArchive.extractTo(3).

PARAMETERS

	      o $pathto
		- Path to extract the given files to

	      o $files
		- The name of a file or directory to extract, or an array of files/directories to extract

	      o $overwrite
		- Set to TRUE to enable overwriting existing files

RETURN VALUES

	returns TRUE on success, but it is better to check for thrown exception, and assume success if none is thrown.

ERRORS
/EXCEPTIONS
	Throws PharException if errors occur while flushing changes to disk.

EXAMPLES

       Example #1

	      A PharData.extractTo(3) example

	      <?php
	      try {
		  $phar = new PharData('myphar.tar');
		  $phar->extractTo('/full/path'); // extract all files
		  $phar->extractTo('/another/path', 'file.txt'); // extract only file.txt
		  $phar->extractTo('/this/path',
		      array('file1.txt', 'file2.txt')); // extract 2 files only
		  $phar->extractTo('/third/path', null, true); // extract all files, and overwrite
	      } catch (Exception $e) {
		  // handle errors
	      }
	      ?>

SEE ALSO

       Phar.extractTo(3).

PHP Documentation Group 												     PHARDATA.EXTRACTTO(3)