实验4

#include<stdio.h>
int main(void)
{
    double y,x;
    int i,m;
    double cylinder(double x);
    printf("输入m:");
    scanf("%d",&m);
    
    for(i=1;i<=m;i++){
        printf("输入x:");
        scanf("%lf",&x);
        if(x<=0){
            printf("输入错误，重新输入");
        }
        else{
            y=cylinder(x);
        }
        printf("y=%.3f\n",y);
    }
    return 0;

}
double cylinder(double x)
{
    double result;
    if(x<=50){
        result=0.53*x;
    }
    else{
        result=0.58*(x-50)+50*0.53;
    }
        return result;
}