1 #include 
     
        2 using namespace std;  3  4 #include 
      
         5 #include 
       
          6  7 int Count(u_int32_t n)  8 {
    9     int count = 0; 10     while (n) {    11         ++count; 12         n = n & (n - 1); 13     } 14     return count; 15 } 16 17 int main() 18 {
   19     cout << Count(128) << endl; 20     21     return 0; 22 }