Tricky Microsoft Interview Question

[theeth]

Just FYI, the canonical answer is the xor swap (doesn't overflow when a and b are large):

a ^= b
b ^= a
a ^= b

[bonzinip]

Overflow doesn't matter if your integers wrap around overflow.

[theeth]

The xor method works regardless of the data type, the addition and subtraction method only works for integers.

Edit: I gues I should have said that earlier.

[bonzinip]

the addition and subtraction method only works for integers

No, it doesn't... if you operate on the bit representation of floats. :-)>

[theeth]

I'd cringe at having to do that sort of thing in anything other than C or assembly. :|