#include<stdio.h>
void main()
{
float x,r,h,l,s,m,v,z;
scanf ("%f,%f",&r,&h);
x=3.14;
l=2*x*r;/*圆周长*/
s=x*r*r;/*圆面积*/
m=4*x*r;/*圆球表面积*/
v=4/3*x*r*r*r;/*圆球体积*/
z=1/3*h*x*r*r;/*圆柱体积*/
printf("l=%f\ns=%f\nm=%f\nv=%f\nz=%f\n",l,s,m,v,z);
}

#include<stdio.h>
void main()
{
float a=6.4,x=3.4,y;
y=double sin(x)+double log(double a+x);
printf("y=%f\n",y);
}

#include<stdio,h>
void main()
{
float c,F;
scanf ("%f",&F);
c=5*(F-32)/9;/*由华氏温度算出摄氏温度*/
printf("c=%f\n",c);
}

#include<stdio.h>
void main()
{
int x=10,y=20;
x+=x;
printf("%d\n",x);
}

#include<stdio.h>
#include<math.h>
void main()
{
float a,x,y;
a=6.4;
x=3.4;
y=sin(sqrt(a*x)+log(a+x));
printf("y=%f\n",y);
}

#include<stdio.h>
void main()
{
float x,y,h,s;
scanf("%f%f%f",&x,&y,&h);
s=0.5*(x+y)*h;
printf("s=%f\n",s);
}

#include<stdio.h>
mian()
{
int s,a,b,c,x;
scanf("%d",&s);
a=s/100;
b=s%100/10;
c=s%100%10;
x=c*100+b*10+a;
printf("%d\n",x);
}

#include<stdio.h>
void mian()
{
float b,x;
int a;
scanf("%f",&x);
a=x;
b=x-a;
printf("%d\n%f\n",a,b);
}

#include<stdio.h>
void mian()
{
int a,b,c,d,x,y;
scanf("%d",&x);
a=x/10000;
b=x/1000%10;
c=x%100/10;
d=x%10;
if(a==d&&b==c)
printf("yes\n");
else
printf("no\n");
}