Thread: newbie question dealing with an error

I may have posted something along these lines before, but I cannot seem to find the answer to my question in any of my previous posts. I have a program from a teach yourself C book, and am having an error. The program is supposed to print a program listing with line numbers and I got it to work at one point but can't seem to do it now.

here is the code

Code:

/* print_it.c--This program prints a listing with line numbers! */

#include <stdlib.h>
#include <stdio.h>

void do_heading(char *filename);

stdprn = open(USB001, O_WRONLY);

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 );
}

Whenever I try to compile it using gcc, I get this error:

printit.c:8: error: expected identifier or '(' before '&' token

As I am just starting out with C, I would greatly appreciate any help with this. Thanks a bunch.

The open command is not a standard C function, I don't think; and that appears to be line 8. There is a _open defined in MS somewhere, maybe that's what you meant?

I'm in Linux now and I get it to compile with the code listed below. The problem is that instead of printing the heading on the page it belongs to, it prints it on a separate piece of paper (i.e. for a 1 page program, it prints the code on one page and then the heading on another page)

Here is the code:

Code:

/* print_it.c--This program prints a listing with line numbers! */

#include <stdlib.h>
#include <stdio.h>

void do_heading(char *filename);

stdprn = open("/usr/bin/lpr", "w");

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 );
}

Again, I am very new at this (Day 1 basically). So any suggestions would be very welcome. Thanks!