题解 | 求int型正整数在内存中存储时1的个数

import java.util.Scanner;

// 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);
        int nextInt = scanner.nextInt();
        int num = 0;
        do {
            int yu = nextInt % 2;
            if (yu == 1) {
                num++;
            }
            nextInt /= 2;
        } while (nextInt > 0);
        System.out.println(num);
    }
}