package a; public interface Payment { double downPay(double price,double area); }
package a;
public class Residence implements Payment {
public double downPay (double price , double area){
return (price * area * 0.20);
}
}
package a;
public class Commercial implements Payment {
public double downPay (double price , double area){
return (price * area * 0.45);
}
}
package a;
import java.util.Scanner;
public class test {
/**
* @param args
*/
public static void main(String[] args) {
double price;
double area;
Residence a=new Residence();
Commercial b= new Commercial();
Scanner re =new Scanner(System.in);
System.out.println("输入房屋每平米价格");
price = re.nextDouble();
System.out.println("输入房屋面积");
area = re.nextDouble();
System.out.println("住宅产权房屋的首付："+a.downPay(price, area));
System.out.println("商业产权房屋的首付："+b.downPay(price, area));
}
}
