Shift Operators

One 、 Move left ：<<
Move the complement of a number to the left , use 0 fill

#include <stdio.h>
int main()
{
    
    char a = 65;
    char c = a<<1;
    printf("%d", c);
    return 0;
}

The result is ：-126

 Positive numbers ：65
 The positive number is the same as the inverse complement ：01000001
 Result after left shift ：10000010	// This is the original code after moving , Need to be converted to complement 
 Inverse code ：11111101
 Complement code ：11111110
 result ：-126


 negative ：-65
 Original code ：11000001
 Inverse code ：10111110
 Complement code ：10111111
 Move to the left ：01111110		// The original code is a positive number , The former is the same as the latter 
 result ：126

Two 、 Move right ：>>
Move the complement of the number to the right , For unsigned numbers , use 0 fill , For signed numbers , Fill with sign bits .

#include <stdio.h>
int main()
{
    
    char a = -7;
    char c = a>>2;
    printf("%d", c);
    return 0;
}

The result is -2

 negative ：-7
 Original code ：10000111
 Inverse code ：11111000
 Complement code ：11111001
 The result after moving right ：11111110		// This is the original code after moving , Need to be converted to complement 
 Inverse code ：10000001
 Complement code ：10000010
 result ：-2

 Positive numbers ：7
 The positive number is the same as the inverse complement ：00000111
 The result after moving right ：00000001		// This is the original code after moving , It's a positive number , The former is the same as the latter 
 result ：1