Exercism c++ problem

[gcjr]

look this over

output

11000101

void
prBin (
    unsigned val )
{
    for (unsigned mask = 0x80; mask; mask >>= 1)  {
        if (mask & val)
            Serial.print ("1");
        else
            Serial.print ("0");
    }
    Serial.println ();
}

void setup()
{
    Serial.begin (9600);

    prBin (0xC5);
}

void loop() { }