int main(void)
{
    volatile unsigned char temp;    /* declare volatile otherwise 
the optimizer will remove it. */
    temp = 0x35 & 0x0F;        /* ANDing	: 0x35 & 0x0F = 0x05 */
    temp = 0x04 | 0x68;        /* ORing	: 0x04 | 0x68 = 0x6C */
    temp = 0x54 ^ 0x78;        /* XORing	: 0x54 | 0x78 = 0x2C */
    temp = ~0x55;              /* Inverting	: ~0x55 = 0xAA */
    while (1);
    return 0;
}

void SystemInit(void)    /* required by the compiler */
{
}