学步园

    bool bPhaseEnd = false;
    for (int i = 0; i <= 10; ++i) {
        if ( i == 10 ) { 
            bPhaseEnd = true;
        }   
        fprintf ( stdout, "%s%d%c","procesing ", i, bPhaseEnd ? '\n' : '\r' );
        fflush ( stdout );
        usleep(500000);
    }