Splicing and splitting of integer ints

One 、int Splicing and splitting of

1. Split

• int Data types occupy 32 position .
• Split into high 30 Bit and low 2 position , In fact, it's a 32 The height of a bit 30 Bit and low 2 Bit data is taken out .
• for example int a =14
• a Stored hex ：0x0000 000E
• a Stored binary ：0000 0000 0000 0000 | 0000 0000 0000 1110
• a Split height 30 Is it ：（ Binary system ）0000 0000 0000 0000 | 0000 0000 0000 11, The conversion 10 Into the system for 3
• a Split low 2 Is it ：（ Binary system ）10, Convert to decimal to 2.
  

2. Splicing

The order of splicing and splitting is reversed ,
Simply put, put the data a The height of 30 Bit shift left 2 position （ Binary system 0000 0000 0000 0000 | 0000 0000 0000 11）,
Then add low 2 A data （ Binary system 10）

Two 、c++ demo

#include <iostream>
using namespace std;

int main()
{
    
    int a = 14;
    //  hold int a Split into left 30 position , Right 2 position 
    int a_left = (a & 0xfffffffc) >> 2;
    int a_right = (a & 0xfffffff3);
    //  Merge 
    int a_ori = (a_left << 2) + a_right;


    std::cout << "a_left="<<a_left<<endl;
    std::cout << "a_left=" << a_right << endl;
    std::cout << "a_ori=" << a_ori << endl;
}

Output

a_left=3
a_left=2
a_ori=14

Reference resources ：
C++ Operator takes two 32 Digit splicing 64 digit