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Jan 18th, 2009

Flashing the output to the screen for a limited time

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hi you all..

i want to flash the output message to the screen for a limited time. can you plz help me ?

is there something in iomanip, or should i do something with system("pause") and system("clear").. although the latest dont seem to me like a good solution ..

ronjustincase

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Jan 18th, 2009

Re: Flashing the output to the screen for a limited time

Look up the Sleep function to use as a delay for the message. To clear the screan, you can either use the "system("cls"), or better, do it manually:

C++ Syntax (Toggle Plain Text)
void Clear() {
  DWORD n;
  DWORD size;
  COORD coord = {0};
  CONSOLE_SCREEN_BUFFER_INFO csbi;
 
  HANDLE h = GetStdHandle ( STD_OUTPUT_HANDLE );
 
  GetConsoleScreenBufferInfo ( h, &csbi );
 
  size = csbi.dwSize.X * csbi.dwSize.Y;
 
  FillConsoleOutputCharacter ( h, TEXT ( ' ' ), size, coord, &n );
  GetConsoleScreenBufferInfo ( h, &csbi );
  FillConsoleOutputAttribute ( h, csbi.wAttributes, size, coord, &n );
 
  SetConsoleCursorPosition ( h, coord );
}
void Clear() {
  DWORD n;
  DWORD size;
  COORD coord = {0};
  CONSOLE_SCREEN_BUFFER_INFO csbi;

  HANDLE h = GetStdHandle ( STD_OUTPUT_HANDLE );

  GetConsoleScreenBufferInfo ( h, &csbi );

  size = csbi.dwSize.X * csbi.dwSize.Y;

  FillConsoleOutputCharacter ( h, TEXT ( ' ' ), size, coord, &n );
  GetConsoleScreenBufferInfo ( h, &csbi );
  FillConsoleOutputAttribute ( h, csbi.wAttributes, size, coord, &n );

  SetConsoleCursorPosition ( h, coord );
}

William Hemsworth

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Jan 18th, 2009

Re: Flashing the output to the screen for a limited time

ok, the first thing works, e.g.

C++ Syntax (Toggle Plain Text)
for(int i=0; i<10; i++) {
   cout << i; 
   sleep(3);
   system("clear");
}
for(int i=0; i<10; i++) {
   cout << i; 
   sleep(3);
   system("clear");
}

but have no understanding on your second soluction. Is there a lib that should i use;

thanks for your reply

ronjustincase

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Jan 18th, 2009

Re: Flashing the output to the screen for a limited time

That is a windows only solution to clearing the screen, if you're using linux, you should either use system("clear") or use a portable library like ncurses.

Last edited by William Hemsworth; Jan 18th, 2009 at 4:13 pm.

William Hemsworth

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Jan 19th, 2009

Re: Flashing the output to the screen for a limited time

i am with opensuse 11 and system("clear") works
(system("pause")) donot work)

anyway thank you very much for your reply.

ronjustincase

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Jan 19th, 2009

Re: Flashing the output to the screen for a limited time

Using system() commands is not a good idea, and windows specific functions are not a great solution either. You can use Clock() instead of sleep. Also, check out these special control characters as a way of clearing the screen.

death_oclock

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