题解 | #查找输入整数二进制中1的个数#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int number = sc.nextInt();
            String binaryString = Integer.toBinaryString(number);
            String replace = binaryString.replace("0", "");
            System.out.println(replace.length());
        }
        sc.close();
    }


}