题解 | #计算商品打折结算金额#

#include <cstdio>
#include <iostream>
#include <iomanip>
using namespace std;

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

    double cost = 0.0;

    // write your code here.......
    if(price>=5000)
    cost = price*0.6;
    else if(price>=2000)
    cost = price*0.7;
    else if(price>=500)
    cost = price*0.8;
    else 
    cost = price*0.6;
    cout << setiosflags(ios::fixed) << setprecision(1) << cost << endl;
 
    return 0;
}