>>400
/* 1 */
#include <stdio.h>
int main(){
int r,h;
float S,V;
printf("input r : ");scanf("%d",&r);
printf("input h : ");scanf("%d",&h);
S=3.1416*2*r*h + 2*r*r*3.1416;
V=r*r*3.1416*h;
printf("S=%f.\n",S);
printf("V=%f.\n",V);
return 0;
}
/* 3 */
#include <stdio.h>
int main(){
int n1,n2;
printf("input n1 : ");
scanf("%d",&n1);
printf("input n2 : ");
scanf("%d",&n2);
if(n1*n2%12==0)
printf("%d*%dは12の倍数です。\n",n1,n2);
else
printf("%d*%dは12の倍数じゃないよ。\n",n1,n2);
return 0;
}