ID Number: Q23976
3.00 4.00 5.00 5.10 6.00 6.00a 6.00ax 7.00 | 5.10 6.00 6.00a
MS-DOS | OS/2
Summary:
There are three possible ways to send output to a printer. They are
as follows:
1. The most convenient way to send output to the printer is to write
to the preopened stream "stdprn" with the fprintf() function. The
following example will output a line of text to the printer:
#include <stdio.h>
main()
{
fprintf(stdprn, "a line of text\n");
}
2. Output also can be sent to the printer by doing the following:
a. Open the device PRN, LPT1, or LPT2 as a file with the fopen()
function.
b. Use fprintf() to write to the handle returned by fopen().
This approach is similar to Method 1, but requires some
additional set-up overhead, as follows:
#include <stdio.h>
main()
{
FILE *stream;
stream=fopen("PRN", "w");
fprintf(stream, "a line of text\n");
}
3. In MS-DOS it also is possible to send output to the printer from
a C program by using the BIOS printer services under INT 17h, as
follows:
service 0: send byte to the printer.
service 1: initialize the printer.
service 2: get printer status.
These BIOS interrupts can be executed by using the library functions
int86() or int86x(), which are described in the "Microsoft C Compiler
Run-Time Library Reference."
Additional reference words: 5.00 5.10 6.00 6.00a 6.00ax 7.00