Re: Why do they cast it twice?

ManicQin wrote:
>> Not knowing the type of _Val, I can't say, but in general,
>> casting through an unsigned type guarantees a positive value in
>> the long (unless the positive value won't fit).
>
> The same behavior returns when _Val is long and short.
>
>> Yes, the idea is to get the value unsigned, to avoid sign extension
>> for hex and octal representation.
>>
>
> So why not just cast it directly to unsigned long... why the DOUBLE
> cast...
> I'm referring to the line (long)(unsigned short)_Val
> besides ... when casting to unsigned and then to signed isn't the
> result will be signed again?
>

It will not be the same if the short value is negative.


Bo Persson