1 import java.util.*;
 2 public class MinPrice {
 3     public  static void main(String args[]){
 4         Scanner sc =new Scanner(System.in);
 5
 6         double money=0;//总钱数
 7         int biaoshi =1; //是否想继续的标识
 8         while(biaoshi>0)
 9         {
10             System.out.println("请输入你想购书的数量：");
11             int num = sc.nextInt();
12
13             int yushu=num%5;
14             switch(yushu)
15             {
16                 case 0:
17                 {
18                     money=num*8*0.75;
19                     break;
20                 }
21                 case 1:
22                 {
23                     money=(num-1)*8*0.75;
24                     break;
25                 }
26                 case 2:
27                 {
28                     money=(num-2)*8*0.75+8*2*0.95;
29                     break;
30                 }
31                 case 3:
32                 {
33                     if(num==3)
34                     {
35                         money=num*8*0.9;
36                         break;
37                     }
38                     else
39                     {
40                         money=(num-8)*8*0.75+2*8*4*0.85;
41                         break;
42                     }
43
44                 }
45                 case 4:
46                 {
47                      money=(num-4)*8*0.75+8*4*0.8;
48                      break;
49                 }
50             }
51             System.out.println("书的最低价格为："+money);
52             System.out.println("您是否继续，继续选1否则选0");
53             biaoshi =sc.nextInt();
54         }
55
56     }
57 }