An analysis of the principle of using XOR operation to realize two numbers not to exchange values through intermediate variables

Maybe a lot of beginners like me have never seen this symbol ^

This is a different or operational symbol, OK, now we're going to start analyzing how it works!

Knowledge of XOR operation click on this link to learn

Http://baike.baidu.com/view/1452266.htm

After the initial values of I and J are given to 2

respectively for

10--0
5--1
2--0
1

10 binary is 1010

-----------------------------

5--1

2--0

1

5 Binary is 101

The first step:

I=i^j;

Well, we've converted 2 numbers into binary.

Under the different or calculated

1010

0101---complement 0

1111 The result of a---or operation

and convert the binary 1111 to decimal.

1*2^3+1*2^2+1*2^1+1*2^0

8+4+2+1=15

Now the value of I is equal to 15.

Step Two:

J=i^j;

1111

0101

1010

and convert the binary 1010 to decimal.

1*2^3+0*2^2+1*2^1+0*2^0

8+0+2+0=10

Now the value of J is equal to 10.

Step Three:

I=i^j;

1111

1010

0101

Now the value of I is equal to 5.

Finally, the value of I and J is exchanged!

An analysis of the principle of using XOR operation to realize two numbers not to exchange values through intermediate variables