Re: swapping two numbers

Although x could overflow in this case, where it wouldn't with an xor, 
right?

Leonid Grinberg wrote:
>> not in-place cause it's 3 lines, but does not use an external temporay
>> value, and should be language-independent:
>>   x = x + y
>>   y = x - y
>>   x = x - y
>> (IIRC my high school BASIC teacher taught us that)
>
> Yeah, that works. Who said that it can't be 3 lines.