av6

#include<stdio.h>
#define PI 3.1415
int main()
{
float r;
float P = 0, L = 0;
printf("Vnesete go radiusot na krugot : ");
scanf("%f", &r);
L = 2 * r * PI;
P = r * r * PI;
printf("P=%f\n", P);
printf("L=%f\n", L);
return 0;
}