1.5.2-1.6 节练习

Posted 2020-10-28 mayfly-nymph

 1 /*练习 1.23*/ 
 2 #include <iostream>
 3 #include "Sales_item.h" 
 4 
 5 int main(void)
 6 {
 7     Sales_item total, trans;
 8     std::cout << "请输入销售记录" << std::endl;
 9     if(std::cin >> total)
10 {
11     int n = 1;
12     while(std::cin >> trans)
13     {
14         if(compareIsbn(total,trans))
15           ++n;
16         else
17         {
18             std::cout << total << "的销售记录条数为：" << n <<std::endl;
19             total = trans;
20             n = 1; 
21         }
22     }
23         std::cout << total << "的销售条数是：" << std::endl;    
24 }
25     return 0;
26 }

这个是模仿开头的计数器程序写的

1.24自己去试数据就行

1.25是书上的程序

 1 #include <iostream>
 2 #include "Sales_item.h"
 3 
 4 int main()
 5 {
 6     Sales_item total;
 7     if(std::cin >> total){
 8         Sales_item trans;
 9         while(std::cin >> trans){
10         if(total.isbn() == trans.isbn())
11             total += trans;
12         else{
13             std::cout << total << std::endl;
14             total = trans;
15         }
16     }
17     std::cout << total << std::endl;
18     }else{
19         std::cerr << "No data?!" << std::endl;
20         return -1;
21     }
22     return 0;
23 }

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