大佬这样有问题吗？

#include <stdio.h>

float unit_price = 2.3; //单价

int price = 13; //起步价

int min_lc = 3; //最短路程

int max_time = 23; //最晚时间

int min_time = 5; //最早时间

int tax = 1;    //燃油附加税

/**

 * @param int km 路程公里数

 * @param int Time 搭乘时间

*/

float calculate_price(int km,int Time)

{

    float pay_price;

    km = km <= 3 ? 3 : km;

    if(Time >= max_time || Time <= min_time){

        unit_price *= 1.2;

    }

    pay_price = price + (km-min_lc) * unit_price + tax;

    return pay_price;

}

int main()

{

    float one = calculate_price(12,9);

    float two = calculate_price(12,18);

    float pay_price = one + two;

    printf("小明每天打车的钱是：%f",pay_price);

}