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Old 04-18-2004, 06:07 PM   #1
shadow.blue
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noob needs help with console output (c++)


Hi,

I`m trying to create a typewriter effect, which reads a message and displays the output of it
like you would be writing on a typewriter... I think you know what I mean...

Code:
#include <iostream>
#include <unistd.h>
#include <string.h>

int main()

{
        char message[]="Message to be displayed...";
        
        for (int i=0;i<strlen(message);i++)
        {
                                 
                std::cout << message[i] << std::flush;
                usleep(200000); 
        }
        return 0;
}
It works for the function that it puts the lines out char by char...

The thing is... I need a blinking prompt always in front of the character.
Like if you log onto your box, you see the input prompt and the cursor (it may not be blinking at all on your machine, but I think you know what I mean, hehe)

I searched for a function to buffer the output and flush it to make it visible and invisible... bla I am just totally stuck on this one.

Hope someone can help me on this...
 
Old 04-18-2004, 11:27 PM   #2
crabboy
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You should be able to do it with the ncurses library. Look for the curs_set method:

http://en.tldp.org/HOWTO/NCURSES-Pro...WTO/index.html

I found some source here that implements a flashing cursor for some sort of a typing tutor program.

http://cvs.sourceforge.net/viewcvs.p...Fplain&rev=1.4
 
Old 04-19-2004, 07:43 AM   #3
shadow.blue
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Thanks for this hint.

I`ll take some time now to dig into the ncurses docs.
 
Old 04-19-2004, 10:29 AM   #4
shadow.blue
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Hi,

I fiddled around with ncurses, but I have one problem I just don`t
get across...

Whever I run this program, I gives me a segmentation fault.
When I change message[i] to message to print the whole message,
it works. But when I want to print each char of the array, it breaks....



Code:
#include <ncurses.h>
#include <unistd.h>
#include <string.h>

int main()
{

        char message[]="Testmessage 1 2 3";

        initscr();


        for (int i=0;i<strlen(message);i++)
        {

                printw("%s",message[i]);
                refresh();
                usleep(200000);
        }



        endwin();
        return 0;
}
Hope you can help me on this one...
 
Old 04-19-2004, 01:55 PM   #5
crabboy
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Use a "%c" in your printw.
 
Old 04-19-2004, 03:58 PM   #6
shadow.blue
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doh!

Thank you very much. you saved my day


BTW: is it possible to use ncurses library with python?
 
Old 04-19-2004, 04:35 PM   #7
kooch
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yup

http://www.python.org/doc/current/li...le-curses.html
 
Old 04-19-2004, 05:24 PM   #8
shadow.blue
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Good.

... I just switched
 
  


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