#include<stdio.h>
int main()
{
double r,h,s1,s2,v;
double pi=3.1415926;
printf("Enter r and h:\n");
while(scanf("%lf %lf",&r,&h)!=EOF)
{
s1=pi*r*r;
printf("s1=%.4lf：\n",s1);
s2=2*pi*r*h;
printf("s2=%.4lf：\n",s2);
v=pi*r*r*h;
printf("v=%.4lf：\n",v);
}
}