#include <stdio.h>
int cost(int tim,int km)
{   double price =2.3;   //单价2.3
    double start =13;    //起步13
    double money =0;     //总费用
    double a = 1;        //燃油费1元
if(km < 3)
    {
        money = start + a;
       // printf("收起步费%f\n",money);
    }
else if(km>=3)
    {   if(tim>23 ||tim<5)
        {
            money =start +(km-3)*price*1.2 + a;
        }
        else
        {
            money =start +(km-3)*price +a;
            printf("%f\n",money);
        }
    }
    return money;
}

int main()
{   double money;
    money = cost(9,12) + cost(18,12);
    printf("打车费用为%f\n",money);
    return 0;
}