出租车计价

#include<stdio.h>

int main(void)
{
    double length;
    int time;
    double money;

    scanf_s("%lf %d", &length, &time);

    if (length <= 3)
    {
        money = 10;
    }
    else
    {
        if (length <= 10)
        {
            money = 10 + (length - 3) * 2;
        }
        else
        {
            money = 10.0 + (10.0 - 3) * 2.0 + (length - 10) * 3;
        }
    }

    money = money + time / 5 * 2.0;

    printf("%d", (int)(money + 0.5));　　//四舍五入

    return 0;
}