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Identify a the beginning of a line and Line Counting

Posted on 2003-11-17
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Last Modified: 2010-04-15
I was wondering that If I had an essay that I wanted to create a program to display the essay in portions of 20 lines.  How would I Indentigy the beginning of a line, Count 20 lines of the essay, and tell the user to press any key to continue reading the next 20 lines.  
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Question by:teamklimax
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8 Comments
 
LVL 45

Expert Comment

by:sunnycoder
ID: 9769284
Hi teamklimax,

on *nix

fp = popen ( "more", "w" );
infile = fopen ( "inputfile", "r");

while ( fgets ( buffer, BUF_SIZE, infile ) != NULL )
   fputs ( buffer, fp );

Cheers!
Sunny:o)
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LVL 45

Expert Comment

by:sunnycoder
ID: 9769285
Hi teamklimax,

on *nix

fp = popen ( "more", "w" );
infile = fopen ( "inputfile", "r");

while ( fgets ( buffer, BUF_SIZE, infile ) != NULL )
   fputs ( buffer, fp );

Cheers!
Sunny:o)
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Accepted Solution

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sunnycoder earned 345 total points
ID: 9769321
on windows, you have _popen in place of popen but I am not sure how good it is ...
what you can however do is something like

infile = fopen ( "inputfile", "r");

while ( fgets ( buffer, BUF_SIZE, infile ) != NULL )
{
            for ( i = 0; i < 20; i++ )
            {
                      puts ( buffer );
                      if ( fgets ( buffer, BUF_SIZE, infile ) == NULL )
                                 break;
             }
             if ( feof ( infile ) )
                     break;
             getch ();
}

this will be portable code ... however there is still an issue...
how do you know that terminal will have 20 lines and not more or less than that ? The kind of method I listed in my first post will be more effective in taking care of such issues
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Expert Comment

by:not_an_xpert
ID: 9769342
in windows _popen  wrks only for a console application.. for those fancy forms with MFC n all it doesnt work ..
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LVL 45

Expert Comment

by:Kent Olsen
ID: 9770629

Hi teamklimax,

You asked this same question yesterday at this link:

http://www.experts-exchange.com/Programming/Programming_Languages/C/Q_20800948.html



Kent
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LVL 45

Expert Comment

by:Kent Olsen
ID: 10382923

Hi Sunny,

Duplicate question...  Delete/no refund.


Kent
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