how to modify input-output script to show how many line were copied.

ifn = input( 'input file name: ', 's' );
ofn = input('output file name: ', 's' );
ih = fopen( ifn, 'r' );
oh = fopen( ofn, 'w' );
ln = '';
while ischar( ln )
   ln = fgets( ih );
   if ischar( ln )
      fprintf( oh, ln );
   end
end
fclose( ih );
fclose( oh );

So running the script creates another .txt file of the same content as the input file. How do I change the script so it will print out the # of line it copied?

Answer 1

[Shubham Gupta]

Try:

ifn = input( 'input file name: ', 's' );
ofn = input('output file name: ', 's' );

ih = fopen( ifn, 'r' );
oh = fopen( ofn, 'w' );

ln = '';
count = 0;

while ischar( ln )
    ln = fgets( ih );
    if ischar( ln )
        count = count + 1;
        fprintf( oh, ln );
        fprintf('Number of line(s) copied = %d\n',count) % edited line
    end
end

fclose( ih );
fclose( oh );

If you want only final count of line it printed bring the 'edited line' outside the while loop. Let me know if you have doubts !