实验四-计算电费

#include<stdio.h>
int main(void)
{
    int m,i;
    double x,y;    /* 定义x为用电量，y为电费 */
     double cylinder(double x);
     printf("请输入m");
    scanf_s("%d",&m);
     for(i=1;i<=m;i++){
    printf("请输入电量:
");
    scanf_s("%Lf",&x);
    if(x<0){
           printf("sorry,您的输入有误");
        }
    else { 
        y=cylinder(x);
            printf("y=%.3f
",y);
        }
     
     }
return 0;
}
     double cylinder(double x)
     {
         double y;
    
          if(x<=50){
                y=0.53*x;
        }
          
        else{
            y=50*0.53+(x-50)*0.58;
        }
        
            return y;
        }