how to clear screen?

hoda's Avatar, Join Date: Feb 2009
Go4Expert Member
in C programming ; i printf something then i want to make the screen clear and printf another thing .It is for not making my program AMORPHOUS,how can i do that??
thanks.
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shabbir's Avatar, Join Date: Jul 2004
Go4Expert Founder
clrscr is one of the easier option.
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SaswatPadhi's Avatar, Join Date: May 2009
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Quote:
Originally Posted by shabbir View Post
clrscr is one of the easier option.
That will NOT work for compilers which conform to ANSI C, 'cuz the clrscr() is no more present.

So, you can use system("CLS"); to clear screen, but that's OS specific.
So it's better to write a user-defined func like :

Code: C
void ClearScreen(void)
{
      HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
      CONSOLE_SCREEN_BUFFER_INFO csbi;
      GetConsoleScreenBufferInfo(hStdout,&csbi);
      const COORD startCoords = {0,0};
      DWORD dummy;

      FillConsoleOutputCharacter(hStdout,' ',csbi.dwSize.X * csbi.dwSize.Y,startCoords,&dummy);
      SetConsoleCursorPosition(hStdout, startCoords);
}

Remember to #include <windows.h>.
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hoda's Avatar, Join Date: Feb 2009
Go4Expert Member
Quote:
Originally Posted by SaswatPadhi View Post
That will NOT work for compilers which conform to ANSI C, 'cuz the clrscr() is no more present.

So, you can use system("CLS"); to clear screen, but that's OS specific.
So it's better to write a user-defined func like :


Code: C
void ClearScreen(void)</p>
<p>{</p>
<p> HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE);</p>
<p> CONSOLE_SCREEN_BUFFER_INFO csbi;</p>
<p> GetConsoleScreenBufferInfo(hStdout,&csbi);</p>
<p> const COORD startCoords = {0,0};</p>
<p> DWORD dummy;</p>
<p>&nbsp;</p>
<p> FillConsoleOutputCharacter(hStdout,' ',csbi.dwSize.X * csbi.dwSize.Y,startCoords,&dummy);</p>
<p> SetConsoleCursorPosition(hStdout, startCoords);</p>
<p>}</p>
<p>



Remember to #include <windows.h>.
excuse me but it's not working and has a error like this:
error C2601: 'ClearScreen' : local function definitions are illegal
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SaswatPadhi's Avatar, Join Date: May 2009
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Quote:
Originally Posted by hoda View Post
excuse me but it's not working and has a error like this:
error C2601: 'ClearScreen' : local function definitions are illegal
It compiles perfectly fine on my machine.

Error C260 indicates that you are trying to declare a function inside a function.
So, did you directly paste the above code inside your main() ???

You should not do that. You should paste the above function globally and call it from main() or wherever wherever required, this way : ClearScreen();