[Compare Number] How to compare number quickly

/*
把數值放到 陣列當中，並且數值改成為 16進制
*/
    unsigned char ip[4] = {0xA0, 0xA8, 0x64, 0x01};

/*
用 For-loop 來比較
*/
    for (i = 0; i < 4; i++)
    {
        if (a(i) != ip[i])
        {
            return true;
        }
    }