some help pls

[BL]

there's a sumthing like a scandisk tool in linux that will run during
bootup when we have improper bootup. it looks sumthing like this:
[---------\ ] 46%

i find the spinning thingy in the progression bar very interesting.
they actually are animated charaters comprise of \ | / -

I would be grateful if u guys can tell me how to do that using C. Just
the spinning thingy...

thankyou

[Stian Stryni]

BL wrote:

i find the spinning thingy in the progression bar very interesting.
they actually are animated charaters comprise of \ | / -

I would be grateful if u guys can tell me how to do that using C. Just
the spinning thingy...

I'm not entirely sure, but my guess is that they use ncurses. curses are
just to make simple menus and such when you don't want all output to be
enforced at the current bottom of your terminal

[Jonathan Burd]

BL wrote:

there's a sumthing like a scandisk tool in linux that will run during
bootup when we have improper bootup. it looks sumthing like this:
[---------\ ] 46%

i find the spinning thingy in the progression bar very interesting.
they actually are animated charaters comprise of \ | / -

I would be grateful if u guys can tell me how to do that using C. Just
the spinning thingy...

thankyou

<ot>
#include <windows.h>
#include <stdio.h>

void print_spinney ();

void print_spinney ()
{
int i = 0;
char progress_chars[4] = "\\|/-";
for (i = 0; i < 4; ++i)
{
printf ("%c\r", progress_chars[i]);
Sleep(100);
}
}

int main (void)
{
int i = 0;

for (i = 0; i < 10; ++i)
{
print_spinney();
}
return 0;
}

Sleep() is not a standard function.
Neither is windows.h a standard header.
Use something specific for your operating system.
Additionally, this is group about the C language.
</ot>

Regards,
Jonathan.

--
C-FAQ: http://www.eskimo.com/~scs/C-faq/faq.html
C Library: http://www.dinkumware.com/refxc.html
C99 Standard Draft: http://www.open-std.org/jtc1/sc22/wg14/www/docs/n869/
Common C Programming Errors:
http://www.drpaulcarter.com/cs/common-c-errors.php

"Women should come with documentation." - Dave

[Lew Pitcher]

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Hash: SHA1

BL wrote:

there's a sumthing like a scandisk tool in linux that will run during
bootup when we have improper bootup. it looks sumthing like this:
[---------\ ] 46%

i find the spinning thingy in the progression bar very interesting.
they actually are animated charaters comprise of \ | / -

I would be grateful if u guys can tell me how to do that using C. Just
the spinning thingy...

thankyou

I guess it would look something like...

void Spinner(void)
{
char spinner[4] = {'\\','|','/','-'};
static int state = 0;

printf("\b%c",spinner[state++]);
state %= 4;
}

and would be used like...

{
int work_not_completed(void);
void do_some_work(void);

while(work_not_completed())
{
Spinner();
do_some_work();
}
printf("\n");
}
- --
Lew Pitcher
IT Consultant, Enterprise Data Systems,
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed are my own, not my employers')
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[BL]

oh thanks man... the code works... erm a bit correction.. char
progress_chars[4] = "\\|/-"; it should be just char progress_chars[4] =
"\|/-";

it really works.... thank you!

[Michael Mair]

Jonathan Burd wrote:

BL wrote:

there's a sumthing like a scandisk tool in linux that will run during
bootup when we have improper bootup. it looks sumthing like this:
[---------\ ] 46%

i find the spinning thingy in the progression bar very interesting.
they actually are animated charaters comprise of \ | / -

I would be grateful if u guys can tell me how to do that using C. Just
the spinning thingy...

thankyou

<ot>
#include <windows.h>
#include <stdio.h>

void print_spinney ();

void print_spinney ()
{
int i = 0;
char progress_chars[4] = "\\|/-";
for (i = 0; i < 4; ++i)
{
printf ("%c\r", progress_chars[i]);

You want '\b' (backspace), not '\r' (carriage return).
Sleep(100);
}
}

int main (void)
{
int i = 0;

for (i = 0; i < 10; ++i)
{
print_spinney();
}
return 0;
}

Sleep() is not a standard function.
Neither is windows.h a standard header.
Use something specific for your operating system.
Additionally, this is group about the C language.
</ot>

Regards,
Jonathan.

--
E-Mail: Mine is a gmx dot de address.

[Michael Mair]

BL wrote:

oh thanks man... the code works... erm a bit correction.. char
progress_chars[4] = "\\|/-"; it should be just char progress_chars[4] =
"\|/-";

it really works.... thank you!

This is wrong. In order to obtain a backslash character, it has to be
preceded by another backslash, as backslash is a special character in
strings/character constants. Thus, "\\|/-" will contain \, |, /, and -.
Please quote some context, so that people know which post you respond
too. If you are using google: Look for recent posts by "CBFalconer" in
comp.lang.c and read the signature.
-Michael
--
E-Mail: Mine is a gmx dot de address.

[Michael Mair]

Lew Pitcher wrote:

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Hash: SHA1

BL wrote:

there's a sumthing like a scandisk tool in linux that will run during
bootup when we have improper bootup. it looks sumthing like this:
[---------\ ] 46%

i find the spinning thingy in the progression bar very interesting.
they actually are animated charaters comprise of \ | / -

I would be grateful if u guys can tell me how to do that using C. Just
the spinning thingy...

thankyou
I guess it would look something like...

void Spinner(void)
{
char spinner[4] = {'\\','|','/','-'};
static int state = 0;

printf("\b%c",spinner[state++]);

As you usually want to mark some kind of progress, it
may be better the other way round: "%c\b" (otherwise,
you overwrite the last character which may be '*' or
something more useful).
In addition, I'd recommend a fflush(stdout) after
the printf() call (otherwise it very likely won't spin).

Cheers
Michael state %= 4;
}

and would be used like...

{
int work_not_completed(void);
void do_some_work(void);

while(work_not_completed())
{
Spinner();
do_some_work();
}
printf("\n");
}
- --
Lew Pitcher
IT Consultant, Enterprise Data Systems,
Enterprise Technology Solutions, TD Bank Financial Group

(Opinions expressed are my own, not my employers')
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--
E-Mail: Mine is a gmx dot de address.

[BL]

<quote>This is wrong. In order to obtain a backslash character, it has
to be
preceded by another backslash, as backslash is a special character in
strings/character constants. Thus, "\\|/-" will contain \, |, /, and -.

Please quote some context, so that people know which post you respond
too. If you are using google: Look for recent posts by "CBFalconer" in
comp.lang.c and read the signature.</quote>
yeah... but somehow my compiler refuse to work on that "\\|/-".....

[Joona I Palaste]

BL <bo*******@yahoo.com> scribbled the following:

<quote>This is wrong. In order to obtain a backslash character, it has
to be
preceded by another backslash, as backslash is a special character in
strings/character constants. Thus, "\\|/-" will contain \, |, /, and -. Please quote some context, so that people know which post you respond
too. If you are using google: Look for recent posts by "CBFalconer" in
comp.lang.c and read the signature.</quote>
yeah... but somehow my compiler refuse to work on that "\\|/-".....

Please supply the exact source code you're using. Cut&paste, don't
retype. Also show how you are invoking the compiler and the exact error
messages it gives.
This will be of a lot more help than "somehow my compiler refuses to
work".

--
/-- Joona Palaste (pa*****@cc.helsinki.fi) ------------- Finland --------\
\-------------------------------------------------------- rules! --------/
"I will never display my bum in public again."
- Homer Simpson

[Chris Croughton]

On 27 Jan 2005 08:22:07 -0800, BL
<bo*******@yahoo.com> wrote:

oh thanks man... the code works... erm a bit correction.. char
progress_chars[4] = "\\|/-"; it should be just char progress_chars[4] =
"\|/-";

No, there is no such character as \|. That might possibly work on your
compiler, but it is undefined what \| does and on some compilers it will
result in just | (or even an error, since it's undefined behaviour
anything at all could happen). You have to escape the \ with another \
to prevent this.

On some systems you may also need fflush(stdout); after the printf(), \r
isn't guaranteed to flush the output.

Chris C

[aegis]

Michael Mair wrote:

Jonathan Burd wrote:

BL wrote:

there's a sumthing like a scandisk tool in linux that will run during bootup when we have improper bootup. it looks sumthing like this:
[---------\ ] 46%

i find the spinning thingy in the progression bar very interesting. they actually are animated charaters comprise of \ | / -

I would be grateful if u guys can tell me how to do that using C. Just the spinning thingy...

thankyou

<ot>
#include <windows.h>
#include <stdio.h>

void print_spinney ();

void print_spinney ()
{
int i = 0;
char progress_chars[4] = "\\|/-";
for (i = 0; i < 4; ++i)
{
printf ("%c\r", progress_chars[i]);

You want '\b' (backspace), not '\r' (carriage return).

Carriage return seemingly works just as well here.

--
aegis

Sleep(100);
}
}

int main (void)
{
int i = 0;

for (i = 0; i < 10; ++i)
{
print_spinney();
}
return 0;
}

Sleep() is not a standard function.
Neither is windows.h a standard header.
Use something specific for your operating system.
Additionally, this is group about the C language.
</ot>

Regards,
Jonathan.

--
E-Mail: Mine is a gmx dot de address.

[Jonathan Burd]

aegis wrote:

Michael Mair wrote:

Jonathan Burd wrote:
<snip>

printf ("%c\r", progress_chars[i]);

You want '\b' (backspace), not '\r' (carriage return).

Carriage return seemingly works just as well here.

I used the carriage return because he wanted
"just the thingy." However, I agree, that is not
the right way to do it even though it works
fine for this particular instance. '\b' is recommended.
Additionally, ``fflush(stdout);" should be added.

<snip>

Regards,
Jonathan.

--
"Women should come with documentation." - Dave

[Randy Howard]

In article <11*********************@c13g2000cwb.googlegroups. com>, boo_lim86
@yahoo.com says...

yeah... but somehow my compiler refuse to work on that "\\|/-".....

Then you have a typo that you are not seeing, or your compiler is broken.

--
Randy Howard (2reply remove FOOBAR)

[Randy Howard]

In article <11**********************@f14g2000cwb.googlegroups .com>,
ae***@mad.scientist.com says...

You want '\b' (backspace), not '\r' (carriage return).

Carriage return seemingly works just as well here.

Who said the spinner would only be at the start of the line?

--
Randy Howard (2reply remove FOOBAR)