题解 | #牛牛的快递#

#include<stdio.h> int main() { float weight; int cost; char ch; scanf("%f %c",&weight,&ch); if (weight<=1) //判断物品是否小于1kg cost=20; else if (weight-(int)weight==0) //判断是否有小数成分 cost=20+(weight-1)*1; else cost=20+(int)(weight-1)*1+1; cost=ch=='y'?cost+=5:cost; //判断是否速投 printf("%d\n",cost); return 0; }

int main()
{
    float weight;
    int cost;
    char ch;
    scanf("%f %c",&weight,&ch);
    if (weight<=1)
        cost=20;
    else
        if (weight-(int)weight==0)
            cost=20+(weight-1)*1;
        else
            cost=20+(int)(weight-1)*1+1;
    cost=ch=='y'?cost+=5:cost;
    printf("%d\n",cost);
    return 0;
}