/* ********************************* */
/* CPE 101               Winter 2011 */
/* Lab 1                             */
/* Foo program                       */
/*                                   */
/* Alexander Dekhtyar                */
/* ********************************* */

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

#define MY_PI 3.1415926

int main() {

   int radius;
   float circumfence, area;
   float squareSide;

   printf("Computing the circumfence of a circle!\n");
   printf("Enter radius: ");
   scanf("%d", &radius);

   circumfence = 2* radius * MY_PI;
 
   printf("\nThe circumfence of a circle with radius %d is approximately %f\n", radius, circumfence);

   area = MY_PI * radius * radius;

   printf("\nThe area of a circle with radius %d is approximately %f\n", radius, area);
   
   squareSide = sqrt(area);

   printf("\nThe side of a square with the same area is approximately %f\n", squareSide);


   return 0;
   }