Question

How to swap the first two bits of a number in C++

Answer 1

#include <iostream>
    
using namespace std; 
    
void print_bits(unsigned int n) { 
    for (int i = 7; i >= 0; i--)
       cout << ((n >> i) & 1);
    cout << endl;
}
    
int main() 
{ 
    int n = 162; 
   
    print_bits(n);
   
    n ^= (1 << 0);
    n ^= (1 << 1);
     
    print_bits(n);
          
    return 0; 
} 
   
   
    
/*
run:
    
10100010
10100001
 
*/

 

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