题解 | #查找输入整数二进制中1的个数#

方法与【HJ15】求int型正整数在内存中存储时1的个数相同

import java.util.*;
public class Main{
    public static void main(String [] args){
        getNumber();
    }
    public static void getNumber(){
        Scanner scan = new Scanner(System.in);
        while(scan.hasNext()){
            int input = scan.nextInt();
            int remainder = 0;
            int flag = 0;
            while(input>0){
                remainder = input%2;
                if(1 == remainder){
                    flag++;
                }
                input = input>>1;
            }
            System.out.println(flag);
        }
    }
}