power.java

来自「自己写的学校网站框架」· Java 代码 · 共 31 行

package edu.xjusoft.common;

public class Power
{
	public static int userPurview(int b) {
		double a = 2;
		double bb = b;
		int purview = (int) Math.pow(a, bb);
		return purview;
	}

	public static boolean checkPower(int userPurview, int optPurview) {
		
		System.out.println("�û���ӵ��Ȩ�ޣ�" + userPurview + ",��ҪȨ�ޣ�" + optPurview);

		int purviewValue = (int) Math.pow(2, optPurview);
	
		int f1 = userPurview & purviewValue;
	
		int f2 = purviewValue;

		System.out.println("f1:" + f1 + " , f2:" + f2);

		boolean flag = f1 == f2;

		return flag;
	}


}