[摘录]console 清屏

#include <windows.h>

void cls( HANDLE hConsole )
{
   COORD coordScreen = { 0, 0 };    // home for the cursor 
   DWORD cCharsWritten;
   CONSOLE_SCREEN_BUFFER_INFO csbi; 
   DWORD dwConSize;

// Get the number of character cells in the current buffer. 

   if( !GetConsoleScreenBufferInfo( hConsole, &csbi ))
   {
      return;
   }

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

   // Fill the entire screen with blanks.

   if( !FillConsoleOutputCharacter( hConsole,        // Handle to console screen buffer 
                                    (TCHAR) ' ',     // Character to write to the buffer
                                    dwConSize,       // Number of cells to write 
                                    coordScreen,     // Coordinates of first cell 
                                    &cCharsWritten ))// Receive number of characters written
   {
      return;
   }

   // Get the current text attribute.

   if( !GetConsoleScreenBufferInfo( hConsole, &csbi ))
   {
      return;
   }

   // Set the buffer's attributes accordingly.

   if( !FillConsoleOutputAttribute( hConsole,         // Handle to console screen buffer 
                                    csbi.wAttributes, // Character attributes to use
                                    dwConSize,        // Number of cells to set attribute 
                                    coordScreen,      // Coordinates of first cell 
                                    &cCharsWritten )) // Receive number of characters written
   {
      return;
   }

   // Put the cursor at its home coordinates.

   SetConsoleCursorPosition( hConsole, coordScreen );
}

int main( void )
{
    HANDLE hStdout;

    hStdout = GetStdHandle(STD_OUTPUT_HANDLE);

    cls(hStdout);
    
    return 0;
}

-------------------------------
void ClearScreen ();

HANDLE  hConsoleOut;        /* Handle to the console */
CONSOLE_SCREEN_BUFFER_INFO csbiInfo;   /* Console information */

int main(int argc, char* argv[])
{
    hConsoleOut = GetStdHandle( STD_OUTPUT_HANDLE );
    GetConsoleScreenBufferInfo( hConsoleOut, &csbiInfo );
    ClearScreen();
    return 0;
}

void ClearScreen ()
{
    DWORD    dummy;
    COORD    Home = { 0, 0 };
    FillConsoleOutputCharacter (hConsoleOut, ' ', csbiInfo.dwSize.X * csbiIn
fo.dwSize.Y, Home, &dummy );
    SetConsoleCursorPosition (hConsoleOut, Home);
}