python/C++课程/第十四课位运算训练精讲/p164_3.cpp

#include<iostream>
using namespace std;
int main()
{
	int n = 4095;
	int count = 0;
	while (n != 0)
	{
		count++;
		n >>= 1;
	}
	cout << count;
	return 0;
}