What is the best way to add two numbers without using the + operator?

Question

A friend and I are going back and forth with brain-teasers and I have no idea how to solve this one. My assumption is that it\'s possible with some bitwise operators, but n

Answer 1

Cheat. You could negate the number and subtract it from the first :)

Failing that, look up how a binary adder works. :)

EDIT: Ah, saw your comment after I posted.

Details of binary addition are here.