Exclusive or operations ^ and a common role of others

Discover a new knowledge and introduce it to you:

Binary exclusive or operation:The two are equal to 0, not equal to 1.

In this way, we find that the third parameter is not required when two integers are exchanged.
For example, a = 11, B = 9. The following is binary.
A = a ^ B = 1011 ^ 1001 = 0010;
B = B ^ A = 1001 ^ 0010 = 1011;
A = a ^ B = 0010 ^ 1011 = 1001;
In this case, a = 9 and B = 11.

For example, you can exchange two Mc positions by pressing one button. VB

Mybt. onpress = function ()
{
Mc1. _ x = mc1. _ x ^ mc2. _ x;
Mc2. _ x = mc2. _ x ^ mc1. _ x;
Mc1. _ x = mc1. _ x ^ mc2. _ x;
//
Mc1. _ y = mc1. _ y ^ mc2. _ y;
Mc2. _ y = mc2. _ y ^ mc1. _ y;
Mc1. _ y = mc1. _ y ^ mc2. _ y;
}

In this way, it can be passed without monitoring variables.