Binary operation

#include<stdio.h>

int main() 
{
    
	char a = 2; //char Take one byte, here is :
	//0000 0002
	char b = -2;
	//1000 0002

// Original code :
	//1111 1111-0111 1111 -127 127
// Inverse code ：
	// The inverse of a positive number is itself , The inverse code of a negative number is that the minus sign remains unchanged, and all the rest are reversed 
// Complement code 
	// The complement of a positive number is itself , The complement of a negative number is his inverse +1
// stay C Inside, it is actually calculated with complement 
	//1+(-1) 
//-1 Inverse code  1000 0001=》1111 1110 -1 Complement code ： 1111 1111
// 1111 1111+0000 0001= 1 0000 0000  Remove the eighth one 0 The highest position and then put 1 Take over  1000 0000 //128  But because it is overflow, it is -128


}