题解 | #查找输入整数二进制中1的个数#

import java.util.Scanner;

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        while(input.hasNext()){
            int m = input.nextInt();
            System.out.println(Num(m));
        }
    }
    public static int Num(int s){
        int count = 0;
        int a = 0;
        while(s!=0){
            a = s%2;
            if(a == 1){
                count++;
            }
            s=s/2;
        }
        return count;
    }
}