c++ - How to swap two numbers without using temp variables or arithmetic operations?

Question

This equation swaps two numbers without a temporary variable, but uses arithmetic operations:

a = (a+b) - (b=a);

How can I do it without arithmetic operations? I was thinking about XOR.

question from:https://stackoverflow.com/questions/3647331/how-to-swap-two-numbers-without-using-temp-variables-or-arithmetic-operations

Answer 1

a=a+b;
b=a-b;
a=a-b;

This is simple yet effective....