1.用户登录后，判断是否是VIP/非VIP用户。如果是VIP用户，则总价=80%总价，非VIP用户，则无打折。
2.输出总价信息，以及总共购买的商品总数量。
3.不需要界面，纯Java编程。
Number.java
<pre class="java" name="code">public class Number {
private double amount;
public double getAmount() {
return amount;
}
public double setAmount(double amount) {
return this.amount = amount;
}
}
}
Price.java
public class Price {
double price=5.0;
public double vip(double price){
this.price=price;
return 0.8*price;
}
public double common(double price){
this.price=price;
return price;
}
}
</pre><pre class="java" name="code">
</pre><pre class="java" name="code">主函数：
import java.util.*;
public class Zhu {
public static void main(String[] args) {
int n;
String vip;
Price price=new Price();
Number number=new Number();
/*
*
*
*
* */
Scanner scanner=new Scanner(System.in);
System.out.print("请问您是否为Vip用户？ 是：Y 否：N");
vip=scanner.next();
System.out.print("请问您购买的数量:?");
n=Integer.parseInt(scanner.next());
number.setAmount(n);
if(vip.equals("Y")){
System.out.print("vip总消费："+(number.getAmount())*price.vip());
//System.out.print("vip总消费："+(n*price.vip(10));
}
if(vip.equals("N")){
System.out.print("普通用户总消费："+number.getAmount()*price.common());
//System.out.print("普通用户总消费："+n*price.common(10));
}
}
}