Buying "Harry Potter" books questions

First, the topic requirements

Bookstore for the "Harry Potter" series of books promotional activities, a total of 5 volumes, with numbers 0, 1, 2, 3, 4, a single volume of 8 yuan, specific preferential information as follows:

Discount on this number

2 5%

3 10%

4 20%

5 25%

Depending on the number of volumes purchased, the program is able to purchase a batch of books at its lowest price, with the corresponding offers.

Second, design ideas

Existing five books in the offer, already in detail in the table, buy 6 to 9 books, if five of them enjoy 25% discount, we left the table to find the corresponding preferential information, that is, there is a combination of forms, so that the price of the book to buy the lowest.

Third, the Code

1#include <iostream.h>2 voidMain ()3 {4     intNum//this number5     intRecord//Business6     intremainder;//remainder7     DoublePrice ;8     intn=1;9      while(n)Ten     { Onecout<<"Please enter the number of books you buy:"<<Endl; ACin>>num; -record=num/5; -remainder=num%5; the         if(record>=2) -         {  -record--; -remainder=remainder+5; +         } -         if(num<=5) +         { A             Switch(num) at             { -              Case 0: -Price=0; -                  Break; -              Case 1: -Price=8; in                  Break; -              Case 2: toPrice= -*(1-0.05); +                  Break; -              Case 3: thePrice= -*(1-0.1); *                  Break; $              Case 4:Panax NotoginsengPrice= +*(1-0.2); -                  Break; the              Case 5: +Price= +*(1-0.25); A                  Break; the             default: +                  Break; -             } $         } $         Else -         { -             Switch(remainder) the             { -              Case 5:Wuyiprice=record* +*(1-0.25)+ +*(1-0.25); the                  Break; -              Case 6: Wuprice=record* +*(1-0.25)+ +*(1-0.25)+8; -                  Break; About              Case 7: $price=record* +*(1-0.25)+ +*(1-0.2)+ -*(1-0.05); -                  Break; -              Case 8: -price=record* +*(1-0.25)+ +*(1-0.2)*2; A                  Break; +              Case 9: theprice=record* +*(1-0.25)+ +*(1-0.25)+ +*(1-0.2); -                  Break; $             default: the                  Break; the             } the         } thecout<<"buy"<<num<<"The lowest price of this book is:"<<price<<"Yuan"<<Endl; -cout<<"continue entering 1, exit input 0"<<Endl; inCin>>N; the     } the}

Iv. Results of operation

Buying "Harry Potter" books questions