Question

How to find the first set bit in bitset with C++

Answer 1

#include <iostream> 
#include <bitset> 

#define SIZE 32 
    
int main() 
{ 
    std::bitset<SIZE> bs1; 
    std::bitset<SIZE> bs2; 
  
    bs1[3] = 1; 
    bs1[2] = 1;
    std::cout << bs1 << std::endl;
      
    bs2[7] = 1; 
    bs2[12] = 1;
    std::cout << bs2 << std::endl;
 
    std::cout << bs1._Find_first() << std::endl; 
    std::cout << bs2._Find_first() << std::endl; 
} 
  
  
  
/*
run:
  
00000000000000000000000000001100
00000000000000000001000010000000
2
7

*/

 

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