题解 | #计算商品打折结算金额#

#include <iostream>
using namespace std;

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

    double cost = 0.0;

    // write your code here.......
    if      (price >= 100 && price < 500) 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;
    else cost = price;

    cout << cost << endl;

    return 0;
}