Std15.10.08_8

#include <stdio.h>
#include <math.h>

int main()
{
    int a;
    float b;
    printf("Podaj promien kola: ");
    scanf("%d",&a);
    b=2*M_PI*a;
    printf("Obwod to: %0.3f", b);
    b=M_PI*(a*a);
    printf("\nPole to: %0.3f", b);
    return 0;
}