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;
    if (price >= 100 && price < 500)
        cout << price * 0.9; 
    else if (price >= 500 && price < 2000)
        cout << price * 0.8;
    else if (price >= 2000 && price < 5000)
        cout << price * 0.7;
    else if (price >= 5000)
        cout << price * 0.6;
    return 0;
}