Hey all,
First post to the forum. I am trying to learn C and I am really excited, however, I wonder if my choice of text was bad. I picked up Sams Learn C in 21 days and I am trying to compile the print_it program. I am getting all kinds of errors that point to stdprn. Apparently, stdprn is defined for a Windows/Dos environment and I am using Linux.
I did google this and tried to fix the issue, only being met with other errors and I am in over my head. Here is the original .c program(Below are modifications I tried):
Code:
/* 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);
}
Here is where I try to define stdprn, only met with more errors:
Code:
/* 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[] )
FILE *stdprn = popen("/usr/bin/lpr", "w");
{
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);
}
How would I go about getting this resolved?
Thanks!!!
Joe