Progress Bar ASCII

#include <iostream>

// Verifica o sistema operacional (_WIN32, _WIN64)
#ifdef _WIN32
    // Utilizado para fazer a pausa
    #include <windows.h>
#else
    #error S.O. NAO SUPORTADO
#endif

using namespace std;

#define BLOCK 0xDB
#define EMPTY 0x20

class progress_bar
{
    private:
        unsigned short tamanho;
        unsigned short progresso;

    public:
        progress_bar( unsigned short p, unsigned short t )
        {
            setTamanho( t );
            setProgresso( p );
        }

        progress_bar()
        {
            setTamanho( 20 );
            setProgresso( 0 );
        }

        void show()
        {
            int block;
            int qtd = 0;

            cout << "    |";
            for( block=0; block<getTamanho(); block++ )
            {
                if( qtd < (getTamanho()*getProgresso())/100 )
                {
                    cout << char(BLOCK);
                    qtd++;
                }
                else
                    cout << char(EMPTY);
            }

            cout << "|  " << getProgresso() << "%\r\r";
        }

        void setTamanho( unsigned short t )
        {
            tamanho = t;
        }

        unsigned short getTamanho()
        {
            return tamanho;
        }

        void setProgresso( unsigned short p )
        {
            progresso = p;
        }

        unsigned short getProgresso()
        {
            return progresso;
        }

};

int main()
{
    progress_bar progress(0, 20);

    cout << "\n  progress bar simples em ascii: \n\n";

    for( int i=0; i<=100; i++)
    {
        progress.setProgresso(i);
        progress.show();
        Sleep( 500 );
    }

    system("pause>nul");
    return 0;
}