Question

How to print the bits of a number in C++

Answer 1

#include <iostream> 

void print_bits(int n) { 
   for (int i = 31; i >= 0; i--) {
        std::cout << ((n >> i) & 1);
   }
} 
    
int main() 
{ 
    int n = 1358; 
      
    print_bits(n);
} 

 
 
/*
run:
 
00000000000000000000010101001110
 
*/

 

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Answer 2

#include <iostream>
#include <bitset>

int main() 
{ 
    int n = 162; 
    
    std::cout << std::bitset<8>(n) << std::endl;
} 
    
    
     
/*
run:
     
10100010
 
*/

 

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Answer 3

#include <iostream> 

void print_bits(int n) { 
    if (n > 1)  {
        print_bits(n>>1); 
    }
       
    std::cout << (n & 1); 
} 
     
int main() 
{ 
    int n = 1358; 
       
    print_bits(n);
} 
  

  
/*
run:
  
10101001110
  
*/

 

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