You haven't done what I told you to do ... You should try to eliminate the global variables line and page as well if possible.
Code:
#include <stdlib.h>
#include <stdio.h>
void do_heading(FILE *prn, char *filename);
int line = 0, page = 0;
int main( int argv, char *argc[] )
{
char buffer[256];
FILE *fp;
FILE *prn;
prn = popen("/usr/bin/lp", "w");
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!\n\n",argc[1]);
return(1);
}
page = 0;
line = 1;
do_heading(prn, argc[1]);
while( fgets( buffer, 256, fp ) != NULL )
{
if (line % 55 == 0)
do_heading(prn, argc[1] );
fprintf( prn, "%4d:\t%s", line++, buffer );
}
fprintf( prn, "\f" );
fclose(fp);
return 0;
}
void do_heading(FILE *prn, char *filename )
{
page++;
if (page > 1)
fprintf( prn, "\f" );
fprintf( prn, "Page: %d, %s\n\n", page, filename);
}