Ok, I hsve decided to learn C, everything seems to be going okay, but I have hit a bit of a stumbling block. I am working on an example from a book I am using and I get the following error when I try to compile the program,

print_it.c: In function `main':
print_it.c:32: error: `stdprn' undeclared (first use in this function)
print_it.c:32: error: (Each undeclared identifier is reported only once
print_it.c:32: error: for each function it appears in.)
print_it.c: In function `do_heading':
print_it.c:41: error: `page' undeclared (first use in this function)
print_it.c:44: error: `stdprn' undeclared (first use in this function)

here is the code for the program,

#include <stdio.h>
#include <stdlib.h>
int main (int argv, char *argc[])
{
void do_heading (char *filename);

int line = 0, page = 0;

char buffer[256];
FILE *fp;

if (argv < 2)
{
fprint (stderr, "\nProper Usage is: ");
fprint (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);
}

fprint (stdprn, "\f");
fclose (fp);
return 0;
}
void do_heading (char *filename)
{
page++;

if (page > 1)
fprint (stdprn, "\f");
fprintf (stdprn, "Page: %d, %s\n\n", page, filename);
}

I know my problem has to do with "stdprn" but how do I fix this.

DOS compilers supplied a stdprn stream; linux does not.

I see, is there a way to adjust this code to run on Linux without using stdprn?

Try something like this: