Re: Subtracting unsigned entities

fred.l.kleinschmidt@[EMAIL PROTECTED]
 wrote:

> If one knows that x and y are unsigned integers (of unknown size -
> they may be short, int, long, long long), what is the most ****table
> way to determine their difference?
> 
> If x is smaller than y, then x-y is negative.
> 
> A naive approach is
>    if ( x > y ) {
>       ...
>    }
> 
> but a compiler may code (x>y) as  (x-y > 0).

It might code it as `x + 17`, too, but if it wants to be correct
both decisions would be suspect.

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