Printing progressbar

[H?vard Sj?voll]

Anyone got any code for how to print a progressbar in a console-window?

That is, - something like

"Loading: X%"

where X is continousely updated.

-håvard-

[Unforgiven]

"H?vard Sj?voll" <sj*****@orakel.ntnu.no> wrote in message
news:2f**************************@posting.google.c om...

Anyone got any code for how to print a progressbar in a console-window?

That is, - something like

"Loading: X%"

for( int x = 0; x <= 100; ++x )
{
std::cout << "Loading: " << x << "%\r" << std::flush;
// do something
}

\r without \n sends the cursor back to the beginning of the line but not to
a new line, so you can overwrite the previous contents of the line. This is
afaik the only standards-compliant portable way to do it.

--
Unforgiven

[Victor Bazarov]

H?vard Sj?voll wrote:

Anyone got any code for how to print a progressbar in a console-window?

That is, - something like

"Loading: X%"

where X is continousely updated.

Something like

std::cout << "\rLoading: " << Xvalue << '%';

The behaviour of your terminal when \r is printed to it is of course
OS-specific, but it usually works the way you want it.

Don't forget to print 'std::endl' when you're done to move to the next
line.

Victor

[Sree]

Standard C++ doesn't offer any way to do it. You have to refer to your system
related console programming manuals for it.

--
Use our news server 'news.foorum.com' from anywhere.
More details at: http://nnrpinfo.go.foorum.com/

[Allan Bruce]

"Victor Bazarov" <v.********@comAcast.net> wrote in message
news:9W*****************@ord-read.news.verio.net...

H?vard Sj?voll wrote:

Anyone got any code for how to print a progressbar in a console-window?

That is, - something like

"Loading: X%"

where X is continousely updated.

Something like

std::cout << "\rLoading: " << Xvalue << '%';

The behaviour of your terminal when \r is printed to it is of course
OS-specific, but it usually works the way you want it.

Don't forget to print 'std::endl' when you're done to move to the next
line.

Victor

If this doesnt work, another way I found was to use several \b - so
basically:

for (int i=0; i<LengthOfProgressInChars; i++)
std::cout << "\b";
std::cout << "\rLoading: " << Xvalue << '%';

Allan

[Mike Weller]

Victor Bazarov wrote:

H?vard Sj?voll wrote:

Anyone got any code for how to print a progressbar in a console-window?

That is, - something like
"Loading: X%"

where X is continousely updated.

Something like

std::cout << "\rLoading: " << Xvalue << '%';

The behaviour of your terminal when \r is printed to it is of course
OS-specific, but it usually works the way you want it.

Don't forget to print 'std::endl' when you're done to move to the next
line.

Victor

Yeah I think the best way to do this is with your final progress bar
dislpayed as, for example:

[0%...25%...50%...75%...100%]

And progressivly add a '.' or number to the end. Something like this:

//----------------------------
cout << "[";

for ( int x = 0; x <= 100; x++ )
{
if ( !( x % 20 ) ) // display every 20th number
cout << x << "%";
else if ( !( x % 5) ) // otherwise display a dot every 5 numbers
cout << ".";
}

cout << "]";
//----------------------------

[Mike Weller]

Victor Bazarov wrote:

H?vard Sj?voll wrote:

Anyone got any code for how to print a progressbar in a console-window?

That is, - something like
"Loading: X%"

where X is continousely updated.

Something like

std::cout << "\rLoading: " << Xvalue << '%';

The behaviour of your terminal when \r is printed to it is of course
OS-specific, but it usually works the way you want it.

Don't forget to print 'std::endl' when you're done to move to the next
line.

Victor

Yeah I think the best way to do this is with your final progress bar
dislpayed as, for example:

[0%...25%...50%...75%...100%]

And progressivly add a '.' or number to the end. Something like this:

//----------------------------
cout << "[";

for ( int x = 0; x <= 100; x++ )
{
if ( !( x % 20 ) ) // display every 20th number
cout << x << "%";
else if ( !( x % 5) ) // otherwise display a dot every 5 numbers
cout << ".";
}

cout << "]";
//----------------------------

[Owen Jacobson]

On Thu, 24 Jun 2004 16:45:44 +0100, Allan Bruce wrote:

"Victor Bazarov" <v.********@comAcast.net> wrote in message
news:9W*****************@ord-read.news.verio.net...

H?vard Sj?voll wrote:

> Anyone got any code for how to print a progressbar in a console-window?
>
> That is, - something like
>
> "Loading: X%"
>
> where X is continousely updated.

Something like

std::cout << "\rLoading: " << Xvalue << '%';

The behaviour of your terminal when \r is printed to it is of course
OS-specific, but it usually works the way you want it.

Don't forget to print 'std::endl' when you're done to move to the next
line.

Victor

If this doesnt work, another way I found was to use several \b - so
basically:

for (int i=0; i<LengthOfProgressInChars; i++)
std::cout << "\b";
std::cout << "\rLoading: " << Xvalue << '%';

<platform-specific behaviour>

Watch it with that. If you go too far backwards, some versions of Windows
(NT-based ones) will bluescreen spectacularly.

<http://homepages.tesco.net/~J.deBoynePollard/FGA/csrss-backspace-bug.html>

</platform-specific behaviour>

--
Some say the Wired doesn't have political borders like the real world,
but there are far too many nonsense-spouting anarchists or idiots who
think that pranks are a revolution.

[Unforgiven]

"Owen Jacobson" <an******@lionsanctuary.net> wrote in message
news:pa****************************@lionsanctuary. net...

On Thu, 24 Jun 2004 16:45:44 +0100, Allan Bruce wrote:

"Victor Bazarov" <v.********@comAcast.net> wrote in message
news:9W*****************@ord-read.news.verio.net...

H?vard Sj?voll wrote:
> Anyone got any code for how to print a progressbar in a
> console-window?
>
> That is, - something like
>
> "Loading: X%"
>
> where X is continousely updated.

Something like

std::cout << "\rLoading: " << Xvalue << '%';

The behaviour of your terminal when \r is printed to it is of course
OS-specific, but it usually works the way you want it.

Don't forget to print 'std::endl' when you're done to move to the next
line.

Victor

If this doesnt work, another way I found was to use several \b - so
basically:

for (int i=0; i<LengthOfProgressInChars; i++)
std::cout << "\b";
std::cout << "\rLoading: " << Xvalue << '%';

<platform-specific behaviour>

Watch it with that. If you go too far backwards, some versions of Windows
(NT-based ones) will bluescreen spectacularly.

<http://homepages.tesco.net/~J.deBoynePollard/FGA/csrss-backspace-bug.html>

</platform-specific behaviour>

Yup. The bug was fixed in Windows 2000 SP3 and Windows XP SP1. In NT4 it'll
remain a bug forever.

--
Unforgiven