题解 | #求int型正整数在内存中存储时1的个数#

import java.util.Scanner;
import java.util.Arrays;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
       Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            int i = scanner.nextInt();
            String s = Integer.toString(i, 2);
            String[] split = s.split("");
            String string = Arrays.toString(split);
//            System.out.println(string);
            int count=0;
            for (int j = 0; j <split.length; j++) {
                if (split[j].equals("1")){
                    count++;
                }
            }
            System.out.println(count);
        }
    }
}