#include <stdio.h>
int main()
{
double r,h;
double s,v,l;
printf("输入半径和高:");
scanf("%lf %lf",&r,&h);
s=3.14159*r*r;
v=s*h;
l=2*3.14159*r;
printf("圆的面积为%lf\n",s);
printf("圆的周长为%lf\n",l);
printf("圆柱的体积为%lf\n",v);
return 0;
}