how to clear screen ??

how to clear screen ??

[Martijn]

Hello everyone,

I'm a gcc newbe
As in the subject: What is the command (or perhaps: trick) to clear your
screen while running gcc in your terminal-mode?

thanx,

Martijn

Re: how to clear screen ??

[Lokesh Setia]

Write "clear" in your shell and press enter before you run gcc.
or type Control-L if you use bash or tcsh as your shell.

Regards,
Lokesh.


>>>>> "Martijn" == Martijn  <nobody@nowhere.org> writes:

    Martijn> Hello everyone, I'm a gcc newbe As in the subject: What
    Martijn> is the command (or perhaps: trick) to clear your screen
    Martijn> while running gcc in your terminal-mode?

    Martijn> thanx,

    Martijn> Martijn



-- 
When we come back, I'll drop a line. (The Doors)

Re: how to clear screen ??

[Martijn]

Thanx for the reaction....
but what I meant was: How can I get my screen cleared from within my
c-program??

regards.
Martijn

Lokesh Setia <lokeshs@sh.bel.alcatel.be> wrote in message
news: xnhk8n0yno9.fsf@sh.bel.alcatel.be ...
>
> Write "clear" in your shell and press enter before you run gcc.
> or type Control-L if you use bash or tcsh as your shell.
>
> Regards,
> Lokesh.
>
>
> >>>>> "Martijn" == Martijn  <nobody@nowhere.org> writes:
>
>     Martijn> Hello everyone, I'm a gcc newbe As in the subject: What
>     Martijn> is the command (or perhaps: trick) to clear your screen
>     Martijn> while running gcc in your terminal-mode?
>
>     Martijn> thanx,
>
>     Martijn> Martijn
>
>
>
> --
> When we come back, I'll drop a line. (The Doors)

Re: how to clear screen ??

[Pete Mullins]

Martijn <nobody@nowhere.org> wrote in message
news: 820mu3$qv5v$1@reader3.wxs.nl ...
> Hello everyone,
>
> I'm a gcc newbe
> As in the subject: What is the command (or perhaps: trick) to clear your
> screen while running gcc in your terminal-mode?
>

The vt200 code is: esc [ 2 j   (no spaces)

you could write this to standard out. You may need to home the cursor as
well:

esc [ 1 ; 1 H

Re: how to clear screen ??

[Lokesh Setia]

Write "clear" in your shell and press enter before you run gcc.
or type Control-L if you use bash or tcsh as your shell.

Regards,
Lokesh.


>>>>> "Martijn" == Martijn  <nobody@nowhere.org> writes:

    Martijn> Hello everyone, I'm a gcc newbe As in the subject: What
    Martijn> is the command (or perhaps: trick) to clear your screen
    Martijn> while running gcc in your terminal-mode?

    Martijn> thanx,

    Martijn> Martijn



-- 
When we come back, I'll drop a line. (The Doors)

Re: how to clear screen ??

[Pete Mullins]

Martijn <nobody@nowhere.org> wrote in message
news: 820mu3$qv5v$1@reader3.wxs.nl ...
> Hello everyone,
>
> I'm a gcc newbe
> As in the subject: What is the command (or perhaps: trick) to clear your
> screen while running gcc in your terminal-mode?
>

The vt200 code is: esc [ 2 j   (no spaces)

you could write this to standard out. You may need to home the cursor as
well:

esc [ 1 ; 1 H

how to clear screen ??

[Martijn]

Hello everyone,

I'm a gcc newbe
As in the subject: What is the command (or perhaps: trick) to clear your
screen while running gcc in your terminal-mode?

thanx,

Martijn

Re: how to clear screen ??

[Martijn]

Thanx for the reaction....
but what I meant was: How can I get my screen cleared from within my
c-program??

regards.
Martijn

Lokesh Setia <lokeshs@sh.bel.alcatel.be> wrote in message
news: xnhk8n0yno9.fsf@sh.bel.alcatel.be ...
>
> Write "clear" in your shell and press enter before you run gcc.
> or type Control-L if you use bash or tcsh as your shell.
>
> Regards,
> Lokesh.
>
>
> >>>>> "Martijn" == Martijn  <nobody@nowhere.org> writes:
>
>     Martijn> Hello everyone, I'm a gcc newbe As in the subject: What
>     Martijn> is the command (or perhaps: trick) to clear your screen
>     Martijn> while running gcc in your terminal-mode?
>
>     Martijn> thanx,
>
>     Martijn> Martijn
>
>
>
> --
> When we come back, I'll drop a line. (The Doors)

Re: how to clear screen ??

[Lokesh Setia]

>>>>> "Martijn" == Martijn  <nobody@nowhere.org> writes:

    Martijn> Thanx for the reaction....  but what I meant was: How can
    Martijn> I get my screen cleared from within my c-program??

But you said you wanted to clear the screen while running gcc. What
you should have said was "while running my gcc-compiled program",
unless you're writing gcc of course :)

Anyway, the following should work on most systems:

system("clear");

or

system("tput clear");

or echo the clear's escape code itself, it's usually portable for
commonly used terminals, but not always.

Find out the code from:

[lokeshs@solaris] ~> tput clear | od -c
0000000 033   [   H 033   [   2   J
0000007
[lokeshs@solaris] ~> 

So, you print "Esc [ H Esc [ 2 J", 
that's "\033[H\033[2J" if you use printf(); (be sure to flush out
yourself as it does'nt contain a newline).

HTH,
Lokesh.




    Martijn> Lokesh Setia <lokeshs@sh.bel.alcatel.be> wrote in message
    Martijn> news:xnhk8n0yno9.fsf@sh.bel.alcatel.be ...
    >>  Write "clear" in your shell and press enter before you run
    >> gcc.  or type Control-L if you use bash or tcsh as your shell.
    >> 
    >> Regards, Lokesh.
    >> 
    >> 
    >> >>>>> "Martijn" == Martijn <nobody@nowhere.org> writes:
    >> 
    Martijn> Hello everyone, I'm a gcc newbe As in the subject: What
    Martijn> is the command (or perhaps: trick) to clear your screen
    Martijn> while running gcc in your terminal-mode?
    >>
    Martijn> thanx,
    >>
    Martijn> Martijn
    >> 
    >> 
    >> 
    >> -- When we come back, I'll drop a line. (The Doors)



-- 
When we come back, I'll drop a line. (The Doors)

Re: how to clear screen ??

[Lokesh Setia]

>>>>> "Martijn" == Martijn  <nobody@nowhere.org> writes:

    Martijn> Thanx for the reaction....  but what I meant was: How can
    Martijn> I get my screen cleared from within my c-program??

But you said you wanted to clear the screen while running gcc. What
you should have said was "while running my gcc-compiled program",
unless you're writing gcc of course :)

Anyway, the following should work on most systems:

system("clear");

or

system("tput clear");

or echo the clear's escape code itself, it's usually portable for
commonly used terminals, but not always.

Find out the code from:

[lokeshs@solaris] ~> tput clear | od -c
0000000 033   [   H 033   [   2   J
0000007
[lokeshs@solaris] ~> 

So, you print "Esc [ H Esc [ 2 J", 
that's "\033[H\033[2J" if you use printf(); (be sure to flush out
yourself as it does'nt contain a newline).

HTH,
Lokesh.




    Martijn> Lokesh Setia <lokeshs@sh.bel.alcatel.be> wrote in message
    Martijn> news: xnhk8n0yno9.fsf@sh.bel.alcatel.be ...
    >>  Write "clear" in your shell and press enter before you run
    >> gcc.  or type Control-L if you use bash or tcsh as your shell.
    >> 
    >> Regards, Lokesh.
    >> 
    >> 
    >> >>>>> "Martijn" == Martijn <nobody@nowhere.org> writes:
    >> 
    Martijn> Hello everyone, I'm a gcc newbe As in the subject: What
    Martijn> is the command (or perhaps: trick) to clear your screen
    Martijn> while running gcc in your terminal-mode?
    >>
    Martijn> thanx,
    >>
    Martijn> Martijn
    >> 
    >> 
    >> 
    >> -- When we come back, I'll drop a line. (The Doors)



-- 
When we come back, I'll drop a line. (The Doors)

Re: how to clear screen ??

[Edward A. Falk]

In article <38444023_1@news2.prserv.net>, Pete Mullins <pmullin@ibm.net> wrote:
>
>Martijn <nobody@nowhere.org> wrote in message
> news:820mu3$qv5v$1@reader3.wxs.nl ...
>> Hello everyone,
>>
>> I'm a gcc newbe
>> As in the subject: What is the command (or perhaps: trick) to clear your
>> screen while running gcc in your terminal-mode?
>>
>
>The vt200 code is: esc [ 2 j   (no spaces)

Very bad practice unless you know for a fact that the program will
*never* be run on anything but vt200-compatible terminals.

Right way to do this is to learn to use libtermcap.  Easy way to
do this is to call system("clear") as another poster has suggested.

--
-ed falk, falk@falconer.vip.best.com	    *********************#*************#
See http://www.rahul.net/falk/whatToDo.html *#**************F******!******!*!!**
and read 12 Simple Things You Can Do	    ********!***************************
to Save the Internet			    #****#******#*********!**WW*W**W

Re: how to clear screen ??

[Edward A. Falk]

In article < 38444023_1@news2.prserv.net >, Pete Mullins <pmullin@ibm.net> wrote:
>
>Martijn <nobody@nowhere.org> wrote in message
> news: 820mu3$qv5v$1@reader3.wxs.nl ...
>> Hello everyone,
>>
>> I'm a gcc newbe
>> As in the subject: What is the command (or perhaps: trick) to clear your
>> screen while running gcc in your terminal-mode?
>>
>
>The vt200 code is: esc [ 2 j   (no spaces)

Very bad practice unless you know for a fact that the program will
*never* be run on anything but vt200-compatible terminals.

Right way to do this is to learn to use libtermcap.  Easy way to
do this is to call system("clear") as another poster has suggested.

--
-ed falk, falk@falconer.vip.best.com	    *********************#*************#
See http://www.rahul.net/falk/whatToDo.html *#**************F******!******!*!!**
and read 12 Simple Things You Can Do	    ********!***************************
to Save the Internet			    #****#******#*********!**WW*W**W

Re: how to clear screen ??

[David C.]

"Martijn" <nobody@nowhere.org> writes:
> 
> I'm a gcc newbe
> As in the subject: What is the command (or perhaps: trick) to clear
> your screen while running gcc in your terminal-mode?

It's actually beyond the scope of a C compiler.  This is in the realm of
system calls.

As was said by others, the curses library is the best way for a Unix app
to manipulate a terminal window.  Check out the man pages for ncurses
for an overview.  It should point you to other man pages for specific
curses functions.  man curs_clear for the curses method of clearning the
screen.

-- David

Re: how to clear screen ??

[David C.]

"Martijn" <nobody@nowhere.org> writes:
> 
> I'm a gcc newbe
> As in the subject: What is the command (or perhaps: trick) to clear
> your screen while running gcc in your terminal-mode?

It's actually beyond the scope of a C compiler.  This is in the realm of
system calls.

As was said by others, the curses library is the best way for a Unix app
to manipulate a terminal window.  Check out the man pages for ncurses
for an overview.  It should point you to other man pages for specific
curses functions.  man curs_clear for the curses method of clearning the
screen.

-- David

Re: how to clear screen ??

[Lokesh Setia]

>>>>> "Martijn" == Martijn  <nobody@nowhere.org> writes:

    Martijn> Thanx for the reaction....  but what I meant was: How can
    Martijn> I get my screen cleared from within my c-program??

But you said you wanted to clear the screen while running gcc. What
you should have said was "while running my gcc-compiled program",
unless you're writing gcc of course :)

Anyway, the following should work on most systems:

system("clear");

or

system("tput clear");

or echo the clear's escape code itself, it's usually portable for
commonly used terminals, but not always.

Find out the code from:

[lokeshs@solaris] ~> tput clear | od -c
0000000 033   [   H 033   [   2   J
0000007
[lokeshs@solaris] ~> 

So, you print "Esc [ H Esc [ 2 J", 
that's "\033[H\033[2J" if you use printf(); (be sure to flush out
yourself as it does'nt contain a newline).

HTH,
Lokesh.




    Martijn> Lokesh Setia <lokeshs@sh.bel.alcatel.be> wrote in message
    Martijn> news:xnhk8n0yno9.fsf@sh.bel.alcatel.be ...
    >>  Write "clear" in your shell and press enter before you run
    >> gcc.  or type Control-L if you use bash or tcsh as your shell.
    >> 
    >> Regards, Lokesh.
    >> 
    >> 
    >> >>>>> "Martijn" == Martijn <nobody@nowhere.org> writes:
    >> 
    Martijn> Hello everyone, I'm a gcc newbe As in the subject: What
    Martijn> is the command (or perhaps: trick) to clear your screen
    Martijn> while running gcc in your terminal-mode?
    >>
    Martijn> thanx,
    >>
    Martijn> Martijn
    >> 
    >> 
    >> 
    >> -- When we come back, I'll drop a line. (The Doors)



-- 
When we come back, I'll drop a line. (The Doors)

Re: how to clear screen ??

[Edward A. Falk]

In article <38444023_1@news2.prserv.net>, Pete Mullins <pmullin@ibm.net> wrote:
>
>Martijn <nobody@nowhere.org> wrote in message
> news:820mu3$qv5v$1@reader3.wxs.nl ...
>> Hello everyone,
>>
>> I'm a gcc newbe
>> As in the subject: What is the command (or perhaps: trick) to clear your
>> screen while running gcc in your terminal-mode?
>>
>
>The vt200 code is: esc [ 2 j   (no spaces)

Very bad practice unless you know for a fact that the program will
*never* be run on anything but vt200-compatible terminals.

Right way to do this is to learn to use libtermcap.  Easy way to
do this is to call system("clear") as another poster has suggested.

--
-ed falk, falk@falconer.vip.best.com	    *********************#*************#
See http://www.rahul.net/falk/whatToDo.html *#**************F******!******!*!!**
and read 12 Simple Things You Can Do	    ********!***************************
to Save the Internet			    #****#******#*********!**WW*W**W

how to clear screen ??

[Martijn]

Hello,

When I use gcc, what is the command for clearing the screen??
(like in Fortran  'clrscr')
Should any special header-file be invoked?

Kind regards

Martijn

how to clear screen ??

[Martijn]

Hello,

When I use gcc, what is the command for clearing the screen??
(like in Fortran  'clrscr')
Should any special header-file be invoked?

Kind regards

Martijn