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<1||price>10000)
    {
        return 0;
    }
    else {
    
    

    if(price>=100 && price<500)
    {
        cost = price*0.9;
    }

    if(price>=500 &&price<2000)
    {
        cost = price*0.8;
    }

    if(price>=2000&&price<5000)
    {
        cost = price*0.7;
    }

    if(price>=5000)
    {
        cost = price*0.6;
    }


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

    return 0;
}