题解 | #计算商品打折结算金额#

#include <iostream>
#include <iomanip>
using namespace std;

int main() {
    
    double price;
    cin >> price;

    double cost = 0.0;

    // write your code here.......
    cost = price>=5000 ? 0.6*price :
                 price>=2000 ? 0.7*price :
                     price>=500 ? 0.8*price :
                        price>=100 ? 0.8*price : price;

    cout << setiosflags(ios::fixed) << setprecision(1) << cost << endl;

    return 0;
}