oneline-cpp-swap-function

Swap two integers in C++ programming language using only one line!

How is this done?

With math you can do this and alot of things! so let us declare two variables, x and y and set them to 1 and 2 respectively:

int x = 1, y = 2;

Now if we apply three equations on our variables we will swap them without declare temporary variable, the equations is:

x; y;      // x =  1 | y = 2
x = x - y; // x = -1 | y = 2
y = x + y; // x = -1 | y = 1
x = y - x; // x =  2 | y = 1

And if we want we can write our equations in one line like this:

x = (y = (x = x - y) + y) - x;

Have fun :D