PTA-基础编程题目集-7-11 分段计算居民水费

题目来源：https://pintia.cn/problem-sets/14/problems/791

 

 注意，当x超过15时，y不是4*15/3+2.5*(x-15)-17.5

 

 

#include<stdio.h>
int main(){
    float x,y;
    scanf("%f",&x);
    if(x>=0&&x<=15){
        printf("%.2f",4*x/3);
    }
    if(x>15){
        printf("%.2f",x*2.5-17.5);
    }
               return 0;
}