stdprn

[zack787]

I know this has been posted before, but I haven't found an answer for what I need.

I am using Teach Yourself C in 21 Days 6th edition. There is a listing called stdprn, which I will list below. The listing is supposed to print (using the printer) out the listing of a program's code with line numbers and stuff.

/* print_it.c--This program prints a listing with line numbers! */
#include <stdlib.h>
#include <stdio.h>

void do_heading(char *filename);

int line = 0, page = 0;

int main( int argv, char *argc[] )
{
  char buffer[256];
  FILE *fp;

  if( argv < 2 )
  {
     fprintf(stderr, "\nProper Usage is: " );
     fprintf(stderr, "\n\nprint_it filename.ext\n" );
     return(1);
  }

  if (( fp = fopen( argc[1], "r" )) == NULL )
  {
       fprintf( stderr, "Error opening file, %s!", argc[1]);
       return(1);
  }

  page = 0;
  line = 1;
  do_heading( argc[1]);

  while( fgets( buffer, 256, fp ) != NULL )
  {
     if( line % 55 == 0 )
        do_heading( argc[1] );

     fprintf( stdprn, "%4d:\t%s", line++, buffer );
  }

  fprintf( stdprn, "\f" );
  fclose(fp);
  return 0;
}

void do_heading( char *filename )
{
   page++;

   if ( page > 1)
      fprintf( stdprn, "\f" );

   fprintf( stdprn, "Page: %d, %s\n\n", page, filename );
}

On my old compiler, it wouldn't compile because stdprn wasn't defined. Now it does compile (on DJGPP), but when i run it all it does is sit there and then eventually display the command prompt without printing anything.

I'd appreciate some assistance with this. Thanks a bunch.

p.s. i am using windows xp and my printer is connected via USB