i got a task to manipulate the jet printer. but i wanna only use C to
implement it and without MS's MFC and APIS,
i have wrote some codes in VS2003 with bioscom() but can not debug
it, and can not see anything from super terminal.
can anybody tell me, is it possible?
3  3090 
On Jun 27, 6:46 pm, helloguys <zhzhl...@gmail .comwrote:
i got a task to manipulate the jet printer. but i wanna only use C to
implement it and without MS's MFC and APIS,
i have wrote some codes in VS2003 with bioscom() but can not debug
it, and can not see anything from super terminal.
can anybody tell me, is it possible?
You will have a bit of trouble printing without using any API, because
the library call to printf() is an API.
Now, you have not described manipulation of the printer. So we can
only guess what you mean by that.
Quite frankly, I'm a poor guesser.
But my guess is that you want:
news:microsoft. public.vc.langu age
or something of that sort.
"helloguys" <zh******@gmail .comha scritto nel messaggio news:11******** **************@ e9g2000prf.goog legroups.com...
>i got a task to manipulate the jet printer. but i wanna only use C to
implement it and without MS's MFC and APIS,
i have wrote some codes in VS2003 with bioscom() but can not debug
it, and can not see anything from super terminal.
can anybody tell me, is it possible?
FILE *prn = fopen("whatever _your_system_ca lls_the_printer ", "w");
In article <f6**********@t di.cu.mi.it>, Army1987 <pl********@for .itwrote:
>
"helloguys" <zh******@gmail .comha scritto nel messaggio news:11******** **************@ e9g2000prf.goog legroups.com...
>>i got a task to manipulate the jet printer. but i wanna only use C to
implement it and without MS's MFC and APIS,
>i have wrote some codes in VS2003 with bioscom() but can not debug
it, and can not see anything from super terminal.
>can anybody tell me, is it possible?
>FILE *prn = fopen("whatever _your_system_ca lls_the_printer ", "w");
OP strongly implies MS Windows, in which case the serial port
might live off on USB somewhere and potentially needs special
handling to locate or create a device name (I haven't programmed
USB, but the dynamic nature of USB device connections pretty
much requires special handling.)
The OP mentioned "serial port". Serial ports almost always need
to be configured with signalling speed, and often need to
be configured with framing or asynch expectations (e.g.,
start bits, stop bits, bits per character, parity). The
mechanisms to make such configurations are outside of C.
So while there is a -possibility- that a plain fopen() of
some OS-specific name will get you Something Useful, the
chances are not good.
Also, I would suggest that "wb" might be more appropriate than "w"
for manipulating a printer: a number of them allow blocks of
data to be encoded in binary, and you don't want random newline
transformations happening in the middle of that.
--
Prototypes are supertypes of their clones. -- maplesoft This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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