课堂作业06

import java.util.Scanner;
public class SaleHaripoter {
	public static void main(String args[])
	{
		int price=8;double money=0;
		Scanner sc=new Scanner(System.in);
		System.out.println("请输入购买的数量：");
		int qty=sc.nextInt();
		if(qty>=0)
		{
		
			if(qty%5==1)
		   {
			money=(qty/5)*(5*price*0.75)+price;
		   }
		
			else if(qty%5==2)
		   {
			money=(qty/5)*(5*price*0.75)+price*2*0.95;
		   }
		
			else if(qty%885==3)
		   {
			money=(qty/5-1)*(5*price*0.75)+2*price*4*0.8;
		   }
		
			else
		   {
			money=(qty/5)*(5*price*0.75)+4*price*0.8;
		   }
		}
		else
		{
			System.out.print("输入有误，请重新输入！");
			System.exit(0);
		}
		System.out.print("最少需支付："+money+"元");
	}
}