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 = price;
    // write your code here.......
    if(price>=5000){
        cost*=0.6;
    }else if(price>=2000 && price<5000){
        cost*=0.7;
    }else if(price>=500 && price<2000){
        cost*=0.8;
    }else if(price>=100){
        cost*=0.9;
    }
    cout << setiosflags(ios::fixed) << setprecision(1) << cost << endl;

    return 0;
}