Shift operators

<< Shift left operator
>> Shift right operator
 
notes ： The operands of the shift operator can only be integers .

Of its operator The object of action is complement

The printed value is calculated according to the original code , So for negative integers , When it becomes a complement to play the shift operation , You have to subtract it first 1, Then the sign bit remains unchanged , The original code of negative numbers obtained by negating other bits by bits calculates the corresponding decimal system according to the original code

Shift left operator ：

Shift rules ：
Abandon on the left 、 The right to repair 0

Shift right operator ：

Shift rules ：
First, there are two kinds of right shift operation ：
1. Logical shift
Use... On the left 0 fill , On the right side of the discarded
2. Arithmetic shift
The left is filled with the sign bit of the original value , On the right side of the discarded  

Warning ：
For shift operators , Don't move negative digits , This is not defined by the standard .
for example ：
int num = 10;
num>>-1;

It's wrong.