Easy One!!

how do you print to the same position/line in stdout?

so for instance if you wanted to do a progress meter for the command prompt... how would you update the %age completed at the command prompt?

can't figure it out... thanks in advance.

Use the '\b' character to go back:

Code:

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#include <stdio.h>
#include <windows.h> /* For Sleep */

int main ( void )
{
  int progress = 0;

  while ( progress <= 100 ) {
    printf ( "\b\b\b\b%3d%%", progress++ );
    fflush ( stdout );
    Sleep ( 100 );
  }
  printf ( "\n" );

  return 0;
}

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nice one. ;)

somebody buy that man a beer.

Quote:

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Originally posted by dug
nice one. ;)

somebody buy that man a beer.

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Uh oh.. :eek:

Quote:

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Originally posted by MrWizard
Uh oh.. :eek:

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Yeah. Duck and Cover!!! :p

You can also use \r to return to the beginning of the line.

>You can also use \r to return to the beginning of the line.
That isn't as flexible though. Most of the time you would prefer to have a format such as this:

Code:

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Percent complete: 10%

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'\r' doesn't give you the ability to do that unless you want to continually rewrite the part of the message that remains constant. This would be a waste and may result in flashiness (the bad kind).

>Uh oh.. :eek:
>Yeah. Duck and Cover!!! :p
:rolleyes:

dug, in case you're wondering what all the stupid responses are about, prelude is a woman.

But someone can buy that woman a beer if her husband doesn't mind.

Quote:

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Originally posted by Prelude
>You can also use \r to return to the beginning of the line.
That isn't as flexible though. Most of the time you would prefer to have a format such as this:

Code:

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Percent complete: 10%

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No, it's not as flexible, but it definitely has its uses. For example a progress bar instead of a percentage. It's much harder with \b whereas \r would be much easier.

a thousand pardon's prelude...

and thanks for your help.