#include <stdio.h>
#include <conio.h>

#define pi 3.14

int main(){
	
    float r , cevre, alan ;
    
    printf("yaricapi giriniz: ");
    
    scanf("%f", &r);
    
    cevre=2*pi*r;
    
    alan=pi*r*r;
    
    printf ("cevre: %f alan: %f \n"  , cevre, alan );
           
    getch();
}