#include<stdio.h>
int main(){
    int rad=4;
    int dia=2*rad;
    float circ=2*3.14*rad;
    float area=3.14*rad*rad;
    printf("Diameter=%d\n",dia);
    printf("Circumference=%.2f\n",circ);
    printf("Area=%.2f\n",area);
}