题解 | #查找输入整数二进制中1的个数#

#include <iostream>
#include <map>
using namespace std;

int main() {
    int data;
    vector<int> ram;
    while(cin >> data)
    {
        ram.push_back(data);
    }

    map<int ,int>Num;

    for (auto it : ram)
	{
		int n = it;
		while (n != 0)
		{
			int a = n % 2;
			Num[a] += 1;
			n = n / 2;
		}

		for (auto it : Num)
		{
			if (it.first == 1)
			{
			    cout << it.second << endl;
			}
		}
		Num.clear();
	}

}
// 64 位输出请用 printf("%lld")