题解 | #牛牛的快递#

#include <stdio.h>

int main() {
    float weight;
    int price;
    char ji;
    scanf("%f %c",&weight,&ji);
    if(weight<=1)//重量小于1kg
    {
        if(ji=='y')
        {
            price=20+5;
        }
        else {
            price=20;
        }
    }else {//重量大于1kg
        weight=weight-1;//price=20
        if(weight<(int)weight+1 &&weight>(int)weight)//判断四舍五入
        {
            weight++;
        }
        if(ji=='y')
        {
            price=20+5+(int)weight;
        }else {
            price=20+(int)weight;
        }

    }
    printf("%d",price);
    return 0;
}