#include <stdio.h>

double getFree(int time, double distance)

{

? ? double starting_price = 13;//起步價

? ? double starting_distance = 3;//起步里程

? ? double unit_price = 2.3;//單價

? ? double actual_price = (time > 23 || time < 5) ? unit_price * 1.2 : unit_price;//夜間單價

? ? double extra_price = 1;//燃油費

? ??

? ? if (distance <= starting_distance)

? ? {

? ? ? ? return starting_price + extra_price;

? ? }

? ? else

? ? {

? ? ? ? return starting_price + extra_price + actual_price * (distance - starting_distance);

? ? }

}

int main()

{

? ? double resFree = getFree(9, 12) + getFree(18, 12);

? ? printf("%f",resFree);

? ? return 0;

}