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Dec 24th, 2004

I Summon Clear Screen

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Sorry to be such a gimmy gimmy... but I couldn't find any threads on some code that clears the screen, just like DOS's 'CLS' and Bash's 'Clear'...I need a function that does the same thing as both CLS and Clear. Thanks for reading and or helping out.

Geek-Master

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Dec 24th, 2004

Re: I Summon Clear Screen

Hmm.... 'clrscr()' from 'conio.h' should serve your purpose

jeanatkin

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Dec 24th, 2004

Re: I Summon Clear Screen

You don't want to do that. It's considered rude in command line programs and in all others building up your own screen will replace what's underneath it anyway (at least while your application is running).

There's no platform independent way to achieve it btw (probably because of that) so if you insist you'll have to plow through your compiler documentation to see if there's a function for it and how to call it.
You could of course always figure out the memory location of your screenbuffer and manually poke zeros into each position and hope.

jwenting

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duckman

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Dec 24th, 2004

Re: I Summon Clear Screen

>I need a function that does the same thing as both CLS and Clear.

C++ Syntax (Toggle Plain Text)
#include <stdlib.h>
#include "system.h"
 
void clear()
{
#if defined(DOS_BASE)
  system("CLS");
#elif defined(UNIX_BASE)
  system("clear");
#else
  #error Unsupported system
#endif
}
#include <stdlib.h>
#include "system.h"

void clear()
{
#if defined(DOS_BASE)
  system("CLS");
#elif defined(UNIX_BASE)
  system("clear");
#else
  #error Unsupported system
#endif
}

Will it work? Probably, provided you define either DOS_BASE or UNIX_BASE in system.h. Is it advisable? No, not really. But I've described why elsewhere, and it's really your decision.

Narue

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Dec 25th, 2004

Re: I Summon Clear Screen

Just to be sure that we are on the same page... the function should only clear the 'output' on the screen... not do anything with the actual program or command prompt. I want to create 'animation' in the command prompt, I have done this before with Batch files by echoing text and then 'cls' and echoing the text in another spot on the line. I want to be able to do the same, by just clearing whats on there and then creating the illusion of animation.

Geek-Master

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Dec 25th, 2004

Re: I Summon Clear Screen

Quote originally posted by Geek-Master ...

Just to be sure that we are on the same page... the function should only clear the 'output' on the screen... not do anything with the actual program or command prompt. I want to create 'animation' in the command prompt, I have done this before with Batch files by echoing text and then 'cls' and echoing the text in another spot on the line. I want to be able to do the same, by just clearing whats on there and then creating the illusion of animation.

I'm having trouble deciding if you're stupid or just can't read well. We understand exactly what you want. You've had three useful replies and two viable solutions. What need is there to be on the same page if you already have a workable answer?

Narue

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Dec 25th, 2004

Re: I Summon Clear Screen

I'm just stupid, and lovin every minute of it

Geek-Master

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Dec 25th, 2004

Re: I Summon Clear Screen

At least you can admit it. Kudos.

Narue

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Dec 25th, 2004

Re: I Summon Clear Screen

LOL, sorry to be such an 4$$ but I'm still a new guy in programming. Just trying to learn a lot at one time. Thanks for the replys.

Geek-Master

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Dec 26th, 2004

Re: I Summon Clear Screen

if you want to clear selective positions, you'll need to write the text that's there in the background colour to those positions.

This is an age old technique employed by terminal applications on mainframes and it works well.

jwenting

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