C언어 VC++] 화면 지우기 함수(cls); 도스창/콘솔 지우는 방법; Console Clear Screen Function

#include <stdio.h>
#include <conio.h> // 예제 속의 getch() 함수를 위해
#include <Windows.h>

void cls(HANDLE hConsole);


int main(void) {
  puts("이런저런 문자열들...");
  puts("이런저런 문자열들...");
  puts("이런저런 문자열들...");
  puts("");
  puts("이제 화면을 지우겠습니다. 아무 키나 누르세요.");
  getch(); // 화면 중지


  // 현재 도스창에 대한 핸들 얻기
  HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);

  cls(hConsole);

  return 0;
}




 // 원본 소스: http://support.microsoft.com/kb/q99261/
 // 여기서부터, 화면 지우기 함수가 시작됨


 /* Standard error macro for reporting API errors */
 #define PERR(bSuccess, api){if(!(bSuccess)) printf("%s:Error %d from %s     on line %d\n", __FILE__, GetLastError(), api, __LINE__);}

 void cls( HANDLE hConsole )
 {
    COORD coordScreen = { 0, 0 };    /* here's where we'll home the
                                        cursor */
    BOOL bSuccess;
    DWORD cCharsWritten;
    CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
    DWORD dwConSize;                 /* number of character cells in
                                        the current buffer */

    /* get the number of character cells in the current buffer */

    bSuccess = GetConsoleScreenBufferInfo( hConsole, &csbi );
    PERR( bSuccess, "GetConsoleScreenBufferInfo" );
    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;

    /* fill the entire screen with blanks */

    bSuccess = FillConsoleOutputCharacter( hConsole, (TCHAR) ' ',
       dwConSize, coordScreen, &cCharsWritten );
    PERR( bSuccess, "FillConsoleOutputCharacter" );

    /* get the current text attribute */

    bSuccess = GetConsoleScreenBufferInfo( hConsole, &csbi );
    PERR( bSuccess, "ConsoleScreenBufferInfo" );

    /* now set the buffer's attributes accordingly */

    bSuccess = FillConsoleOutputAttribute( hConsole, csbi.wAttributes,
       dwConSize, coordScreen, &cCharsWritten );
    PERR( bSuccess, "FillConsoleOutputAttribute" );

    /* put the cursor at (0, 0) */

    bSuccess = SetConsoleCursorPosition( hConsole, coordScreen );
    PERR( bSuccess, "SetConsoleCursorPosition" );
    return;
 }