软件工程课堂练习 图书折扣问题

 1 #include<iostream.h>
 2 int main()
 3 {
 4     int a,b,c;
 5     float h1,h2,h3,sum1,sum2,sum;
 6     cout<<"输入要购买的的本数：";
 7     cin>>a;
 8     b=a%5+5;
 9     c=a/5-1;
10     sum1=c*8;
11     if(a%5==0)
12     {
13         sum=a/5*8*0.8;
14     }
15     else
16     {
17     switch(b)
18     {
19     case 6:
20         h1=3*8*0.9*2;
21         h2=4*8*0.8+2*8*0.95;
22         h3=5*8*0.75+8;
23         if(h1>h2)
24         {
25             h1=h2;
26         }
27         if(h1>h3)
28         {
29             h1=h3;
30         }
31         break;
32     case 7:
33         h1=5*8*0.75+2*8*0.95;
34         h2=4*8*0.8+3*8*0.9;
35         if(h1>h2)
36         {
37             h1=h2;
38         }
39         break;
40     case 8:
41         h1=4*8*0.8*2;
42         h2=5*8*0.75+3*8*0.9;
43         if(h1>h2)
44         {
45             h1=h2;
46         }
47         break;
48     case 9:
49         h1=5*8*0.75+4*8*0.8;
50         break;
51     }
52     sum2=h1;
53     sum=sum1+sum2;
54     }
55     cout<<sum<<endl;
56     return 0;
57 }