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

    return 0;
}