operator.java

实现一个简易的租房系统

package com.wepull.zf.biz;

public class Operator {

	private double n1;
	private double n2;
	private double result;
	
	public double add(){
		result=n1+n2;
		return result;
	}
	public double sub(){
		result=n1-n2;
		return result;
	}
	public double mul(){
		result=n1*n2;
		return result;
	}
	public double div(){
		result=n1/n2;
		return result;
	}
}