软件工程课堂练习购买图书

购书数量对10取余，每10本优惠的最大价钱都相同，然后再加之前以10为周期的优惠价钱，就可以算出总的优惠价格。

 

代码：

 1 #include <iostream>
 2 #include <iomanip>
 3 using namespace std;
 4 int main() {
 5     const float discount[10] = {0,0,0.1,0.3,0.8,1.25,1.25,1.35,1.6,2.05};
 6     int count;
 7     cout << "输入购书数量：";
 8     cin >> count;
 9     if (count < 0)
10     {
11         cout << "Error ! Illegal Input" << endl;
12         exit(1);
13     }
14     float result = (count / 10)* 2.5 + discount[count % 10];
15     cout << "优惠" <<setiosflags(ios::fixed)<<setprecision(2)<< 8 * result << endl;
16 }

 

运行截图

 

转载于:https://www.cnblogs.com/xiaoxt/p/5543405.html