题解 | #计算商品打折结算金额#

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

int main() {
    
    double price=0.0;
    scanf("%lf",&price);
     double cost = 0.0;
    if(price<100){cost=price*1;}
        
    else 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 { cost=price*0.6;}
    
    printf("%.1f",cost);

   

    return 0;
}