题解 | #求int型正整数在内存中存储时1的个数#

最笨办法，占用空间太大，还需要改进

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