#include <LiquidCrystal.h>

// C# LiquidCrystal 基礎類
// C# call 委派類(Delegate)
struct Lcd: LiquidCrystal
{
    char buff[17]{0}, len{0};
    uint32_t x{0}; 
    using LiquidCrystal:: LiquidCrystal;          // C++ 11, 也要繼承 LiquidCrystal類的建構函式 
    //Lcd( const Lcd& ) = delete;                 // 刪除預設的複製建構函式
    //Lcd& operator= ( const Lcd& ) = delete;     // 刪除預設的複製指派運算子
    //Lcd( int ) = delete;                        // 指示gcc刪除這種建構函式.
    //Lcd( char ) = delete;                       // 指示gcc刪除這種建構函式.
    //~Lcd() = default;                           // 指示gcc用預設產生的版本, 因自定的解構函式效率差.
    // explicit B(int) {}                         // 指示gcc參數型態要明確（不可隱式轉換)才可overload.
};

enum
{
    LCD_RS  =  7, LCD_EN  =  8,
    LCD_D4  =  9, LCD_D5  = 10,
    LCD_D6  = 11, LCD_D7  = 12,
    //
    LCD_COL = 16, LCD_ROW =  2,
};

Lcd LCD( LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7 );

void setup()
{ 
    LCD.begin( LCD_COL, LCD_ROW ); 
}

bool test( uint32_t shno )
{
    static uint32_t i{0}; 
    return i++ & ~( -1lu << shno );
}

void loop() 
{ 
    do
    {
        if( test( 0 ) ) break;
        sprintf( LCD.buff, "%16lu", LCD.x++ );
        LCD.setCursor( 0, 0 );
        LCD.print( LCD.buff ); 
    } while(0);
}