Clear screen...

[timprograms]

Hey I'm on a linux and I want help with deleting text... clear the screen no system();
Then color screen red...
Also how can the programmer tell how big the screen is(How many lines)

#include <stdio.h>
#define BG  "\033[7;31m"
#define TXT  "\033[0;37m"
#define CLEAR "\033[2k"
#define UP "\033[A"
void help();
void stupid();
void version();
int main(int argc, char* argv[])
{
if (argc!=2)
{
stupid();
return 1;
}
if (argv[1][0]=='-')
{
switch (argv[1][1])
{
case 'h':
help();
break;
case 'v':
version();
break;
case 'e':
return 1;
default:
stupid();
return 1;
}
}
else
{
int i=0;
while (i<30)
{
printf(UP);
printf(CLEAR);
printf(UP);
i++;
}
printf( BG "Hello, " );
printf( argv[1]);
printf( BG "!\n");
}
return 0;
}
void help()
{
printf("Usage:\n./hello [NAME] [-hv]\n");
printf("\t-h\tHelp\n");
printf("\t-v\tVersion\n");
}
void stupid()
{
printf("STUPID!\n");
printf("TYPE THE NAME OF THE PROGRAM THEN YOUR NAME.\n");
printf("IT ISN'T COMPLICATED!\n");
}
void version()
{
printf("Hello (C) 2013 Tim Palmer\n");
printf("Version: 0.0.2\n");
} 

[Superdude]

Search these forums please.

[timprograms]

I have that's how I got this far... But the CLEAR doesn't seem to work... it just takes cursor to the place up specifies

[Duthomhas]

Your escape code is incorrect.

Here's something for you to play with. Just #include and go:
http://www.cplusplus.com/forum/general/18200/#msg92479

Also, learn to indent. It will help you understand your code a whole lot better.

Hope this helps.



[edit] Oh, yeah, you might want to do it right, since using VT-100 escape codes is error prone and not cross-platform:
http://www.cplusplus.com/forum/beginner/7303/#msg33713

[Superdude]

If you have to, print 100 newlines, then CLEAR.

[timprograms]

About indent I indent when on graphical ide but I'm using vi so it makes it harder
And I saw this before in a search
The link to cross platform escape codes... how do I use it?
About the comment
>You could just print 100 \n then CLEAR
How do I clear?

[Superdude]

printf(CLEAR);

[timprograms]

thank you I got everything except how big is the screen id like to clear only as many lines as the screen is tall...

[Duthomhas]

You can indent just as easily in vim as any other text editor.

Ask stty size for the number of rows and columns. Some systems maintain $ROWS and $COLS as well.

If you are using the VT-100/ANSI escape codes to manipulate the screen, you don't need to care how many lines it has to clear it.

[timprograms]

What is syntax for stty size??? And I am using ansi but what func will clear the whole screen...
All I have is

"\033[2K"

[timprograms]

I found stty size... but if I want to find it in a program not at the shell...?

[Duthomhas]

What is syntax for stty size???

Why not try it?
Or google it?
It took me all of about two seconds to look it up for you.

And I am using ansi but what func will clear the whole screen...
All I have is

"\033[2K"

Perhaps someday I'll see someone actually click a link I provided.

If you are going to ask a question, don't keep answering it before you look at the answers you are given.

ESC [2K doesn't clear the screen -- it clears the current line.

ESC [2J clears the screen and places the cursor in the home position.

I've given you enough help now. Good luck!

[timprograms]

Thank you about ncurses I've tried but it doesn't work on android...
I think I've got every thing so thanks I saw on another post that you made a
PressAnyKey function where is it I couldn't find it...

[Duthomhas]

I didn't realize you were on Android.

Here's something relevant about getting ncurses working on it:
http://credentiality2.blogspot.com/2010/08/compile-ncurses-for-android.html

And here's someone who has done all the dirty work for you:
https://github.com/CyanogenMod/android_external_libncurses


The press any key stuff is in this old article (that I still have to update):
http://www.cplusplus.com/articles/iw6AC542/
Scroll down to the unix section

If Android's terminal emulator is xterm compatible, the little .hpp I provided should work just fine.

[timprograms]

Thanks I think everythings good

[timprograms]

Hey
@duoas
On ncurses if I just have the .h files will that be fine? Do I need to install?
What .hpp???

[giblit]

*.h = c header. *.hpp = cpp header. AFAIK.
http://lmgtfy.com/?q=*.h+vs+*.hpp

[Duthomhas]

sudo apt-get install ncurses-devel



I think... I don't use Android -- or Debian, for that matter.