#include"stdio.h"
#define pi=3.1415926
void main()
{float r,h ,s1，s2 ,v;
printf("Enter  r and h:\n");
scanf("%f%f",&r,&h);
s1=pi*r*r;
printf("s1=%.4f：\n",s1);
s2=2*pi*r*h;
printf("s2=%.4f：\n",s2);
v=pi*r*r*h;
printf（"v=%.4f：\n",v）;


}