# include<stdio.h>
# define n 3.14
int main()
{
float r,h;
double c1,c2,c3;
printf("请输入r:");
scanf("%d",&r);
printf("请输入h:");
scanf("%d",&h);
c1=2*r*n;
c2=r*r*n;
c3=c1*h;
printf("圆的周长:%d\n",c1);
printf("圆的面积:%d\n",c2);
printf("圆住的体积:%d\n",c3);
return 0;
}